Fix PR06 issues in docstrings
Fix the docstrings where there is an error in a parameter format, eg string instead of str.
Current errors:
```
pandas.Series.to_json: Parameter "indent" type should use "int" instead of "integer"
pandas.Timestamp.ceil: Parameter "freq" type should use "str" instead of "string"
pandas.Timestamp.day_name: Parameter "locale" type should use "str" instead of "string"
pandas.Timestamp.floor: Parameter "freq" type should use "str" instead of "string"
pandas.Timestamp.month_name: Parameter "locale" type should use "str" instead of "string"
pandas.Timestamp.round: Parameter "freq" type should use "str" instead of "string"
pandas.Timedelta: Parameter "value" type should use "int" instead of "integer"
pandas.Timedelta: Parameter "value" type should use "str" instead of "string"
pandas.Timedelta.max: Parameter "value" type should use "int" instead of "integer"
pandas.Timedelta.max: Parameter "value" type should use "str" instead of "string"
pandas.Timedelta.min: Parameter "value" type should use "int" instead of "integer"
pandas.Timedelta.min: Parameter "value" type should use "str" instead of "string"
pandas.Timedelta.ceil: Parameter "freq" type should use "str" instead of "string"
pandas.Timedelta.floor: Parameter "freq" type should use "str" instead of "string"
pandas.Timedelta.round: Parameter "freq" type should use "str" instead of "string"
pandas.Period.asfreq: Parameter "freq" type should use "str" instead of "string"
pandas.Period.to_timestamp: Parameter "freq" type should use "str" instead of "string"
pandas.arrays.IntervalArray.from_arrays: Parameter "copy" type should use "bool" instead of "boolean"
pandas.arrays.IntervalArray.from_tuples: Parameter "copy" type should use "bool" instead of "boolean"
pandas.arrays.IntervalArray.from_breaks: Parameter "copy" type should use "bool" instead of "boolean"
pandas.arrays.IntervalArray.to_tuples: Parameter "na_tuple" type should use "bool" instead of "boolean"
pandas.Categorical.from_codes: Parameter "codes" type should use "int" instead of "integer"
pandas.Categorical.from_codes: Parameter "dtype" type should use "str" instead of "string"
pandas.SparseArray: Parameter "kind" type should use "int" instead of "integer"
pandas.read_table: Parameter "cache_dates" type should use "bool" instead of "boolean"
pandas.read_csv: Parameter "cache_dates" type should use "bool" instead of "boolean"
pandas.read_msgpack: Parameter "iterator" type should use "bool" instead of "boolean"
pandas.ExcelWriter: Parameter "path" type should use "str" instead of "string"
pandas.ExcelWriter: Parameter "engine" type should use "str" instead of "string"
pandas.ExcelWriter: Parameter "date_format" type should use "str" instead of "string"
pandas.ExcelWriter: Parameter "datetime_format" type should use "str" instead of "string"
pandas.read_json: Parameter "orient" type should use "str" instead of "string"
pandas.read_html: Parameter "flavor" type should use "str" instead of "string"
pandas.HDFStore.append: Parameter "append      " type should use "bool" instead of "boolean"
pandas.HDFStore.append: Parameter "min_itemsize" type should use "str" instead of "string"
pandas.HDFStore.append: Parameter "nan_rep     " type should use "str" instead of "string"
pandas.HDFStore.append: Parameter "encoding    " type should use "str" instead of "string"
pandas.HDFStore.append: Parameter "dropna      " type should use "bool" instead of "boolean"
pandas.read_spss: Parameter "path" type should use "str" instead of "string"
pandas.read_sql_query: Parameter "sql" type should use "str" instead of "string"
pandas.read_sql_query: Parameter "con" type should use "str" instead of "string"
pandas.read_sql_query: Parameter "index_col" type should use "str" instead of "string"
pandas.read_sql_query: Parameter "coerce_float" type should use "bool" instead of "boolean"
pandas.read_sql: Parameter "sql" type should use "str" instead of "string"
pandas.read_sql: Parameter "con" type should use "str" instead of "string"
pandas.read_sql: Parameter "index_col" type should use "str" instead of "string"
pandas.read_sql: Parameter "coerce_float" type should use "bool" instead of "boolean"
pandas.read_gbq: Parameter "reauth" type should use "bool" instead of "boolean"
pandas.read_gbq: Parameter "auth_local_webserver" type should use "bool" instead of "boolean"
pandas.read_stata: Parameter "convert_dates" type should use "bool" instead of "boolean"
pandas.read_stata: Parameter "convert_categoricals" type should use "bool" instead of "boolean"
pandas.read_stata: Parameter "encoding" type should use "str" instead of "string"
pandas.read_stata: Parameter "index_col" type should use "str" instead of "string"
pandas.read_stata: Parameter "convert_missing" type should use "bool" instead of "boolean"
pandas.read_stata: Parameter "preserve_dtypes" type should use "bool" instead of "boolean"
pandas.read_stata: Parameter "order_categoricals" type should use "bool" instead of "boolean"
pandas.read_stata: Parameter "iterator" type should use "bool" instead of "boolean"
pandas.io.stata.StataReader.data: Parameter "convert_dates" type should use "bool" instead of "boolean"
pandas.io.stata.StataReader.data: Parameter "convert_categoricals" type should use "bool" instead of "boolean"
pandas.io.stata.StataReader.data: Parameter "index_col" type should use "str" instead of "string"
pandas.io.stata.StataReader.data: Parameter "convert_missing" type should use "bool" instead of "boolean"
pandas.io.stata.StataReader.data: Parameter "preserve_dtypes" type should use "bool" instead of "boolean"
pandas.io.stata.StataReader.data: Parameter "order_categoricals" type should use "bool" instead of "boolean"
pandas.core.resample.Resampler.pipe: Parameter "func" type should use "str" instead of "string"
pandas.testing.assert_frame_equal: Parameter "check_index_type" type should use "str" instead of "string"
pandas.testing.assert_frame_equal: Parameter "check_column_type" type should use "str" instead of "string"
pandas.testing.assert_series_equal: Parameter "check_index_type" type should use "str" instead of "string"
pandas.testing.assert_index_equal: Parameter "exact" type should use "str" instead of "string"
pandas.api.types.union_categoricals: Parameter "sort_categories" type should use "bool" instead of "boolean"
pandas.api.types.union_categoricals: Parameter "ignore_order" type should use "bool" instead of "boolean"
pandas.api.types.is_list_like: Parameter "allow_sets" type should use "bool" instead of "boolean"
pandas.qcut: Parameter "q" type should use "int" instead of "integer"
pandas.qcut: Parameter "labels" type should use "bool" instead of "boolean"
pandas.merge_asof: Parameter "left_index" type should use "bool" instead of "boolean"
pandas.merge_asof: Parameter "right_index" type should use "bool" instead of "boolean"
pandas.merge_asof: Parameter "tolerance" type should use "int" instead of "integer"
pandas.merge_asof: Parameter "allow_exact_matches" type should use "bool" instead of "boolean"
pandas.to_numeric: Parameter "downcast" type should use "int" instead of "integer"
pandas.period_range: Parameter "start" type should use "str" instead of "string"
pandas.period_range: Parameter "end" type should use "str" instead of "string"
pandas.period_range: Parameter "periods" type should use "int" instead of "integer"
pandas.period_range: Parameter "freq" type should use "str" instead of "string"
pandas.period_range: Parameter "name" type should use "str" instead of "string"
pandas.timedelta_range: Parameter "start" type should use "str" instead of "string"
pandas.timedelta_range: Parameter "end" type should use "str" instead of "string"
pandas.timedelta_range: Parameter "periods" type should use "int" instead of "integer"
pandas.timedelta_range: Parameter "freq" type should use "str" instead of "string"
pandas.timedelta_range: Parameter "name" type should use "str" instead of "string"
pandas.timedelta_range: Parameter "closed" type should use "str" instead of "string"
pandas.infer_freq: Parameter "warn" type should use "bool" instead of "boolean"
pandas.interval_range: Parameter "periods" type should use "int" instead of "integer"
pandas.interval_range: Parameter "freq" type should use "str" instead of "string"
pandas.interval_range: Parameter "name" type should use "str" instead of "string"
pandas.eval: Parameter "parser" type should use "str" instead of "string"
pandas.eval: Parameter "engine" type should use "str" instead of "string"
pandas.util.hash_array: Parameter "encoding" type should use "str" instead of "string"
pandas.util.hash_array: Parameter "hash_key" type should use "str" instead of "string"
pandas.util.hash_pandas_object: Parameter "index" type should use "bool" instead of "boolean"
pandas.util.hash_pandas_object: Parameter "encoding" type should use "str" instead of "string"
pandas.util.hash_pandas_object: Parameter "hash_key" type should use "str" instead of "string"
pandas.Index.shift: Parameter "freq" type should use "str" instead of "string"
pandas.CategoricalIndex: Parameter "dtype" type should use "str" instead of "string"
pandas.IntervalIndex.from_arrays: Parameter "copy" type should use "bool" instead of "boolean"
pandas.IntervalIndex.from_tuples: Parameter "copy" type should use "bool" instead of "boolean"
pandas.IntervalIndex.from_breaks: Parameter "copy" type should use "bool" instead of "boolean"
pandas.IntervalIndex.to_tuples: Parameter "na_tuple" type should use "bool" instead of "boolean"
pandas.MultiIndex.to_frame: Parameter "index" type should use "bool" instead of "boolean"
pandas.MultiIndex.to_frame: Parameter "name" type should use "str" instead of "string"
pandas.MultiIndex.sortlevel: Parameter "ascending" type should use "bool" instead of "boolean"
pandas.DatetimeIndex.indexer_at_time: Parameter "time" type should use "str" instead of "string"
pandas.PeriodIndex: Parameter "data" type should use "int" instead of "integer"
pandas.PeriodIndex: Parameter "freq" type should use "str" instead of "string"
pandas.PeriodIndex.to_timestamp: Parameter "freq" type should use "str" instead of "string"
pandas.core.groupby.GroupBy.pipe: Parameter "func" type should use "str" instead of "string"
pandas.core.groupby.DataFrameGroupBy.idxmax: Parameter "skipna" type should use "bool" instead of "boolean"
pandas.core.groupby.DataFrameGroupBy.idxmin: Parameter "skipna" type should use "bool" instead of "boolean"
pandas.core.groupby.DataFrameGroupBy.nunique: Parameter "dropna" type should use "bool" instead of "boolean"
pandas.core.groupby.DataFrameGroupBy.shift: Parameter "freq" type should use "str" instead of "string"
pandas.io.formats.style.Styler.set_table_attributes: Parameter "attributes" type should use "str" instead of "string"
pandas.api.extensions.ExtensionArray._from_sequence: Parameter "copy" type should use "bool" instead of "boolean"
pandas.api.extensions.ExtensionArray._from_sequence_of_strings: Parameter "copy" type should use "bool" instead of "boolean"
pandas.api.extensions.ExtensionArray.take: Parameter "indices" type should use "int" instead of "integer"
pandas.DataFrame.idxmax: Parameter "skipna" type should use "bool" instead of "boolean"
pandas.DataFrame.idxmin: Parameter "skipna" type should use "bool" instead of "boolean"
pandas.DataFrame.unstack: Parameter "fill_value" type should use "str" instead of "string"
pandas.DataFrame.to_json: Parameter "indent" type should use "int" instead of "integer"
```