message: feat(datepicker): improve manual DateRange input
  allow the DateRangepicker to ignore missing spaces in manual Input
diff: @@ -181,17 +181,20 @@ export class BsDaterangepickerInputDirective
  );
  }
  - let _input: (string[] | Date[]) = [];
  + let _input: (string | Date)[] = [];
  if (typeof value === 'string') {
  - _input = value.split(this._picker._config.rangeSeparator);
  + const trimmedSeparator = this._picker._config.rangeSeparator.trim();
  + _input = value
  + .split(trimmedSeparator.length > 0 ? trimmedSeparator : this._picker._config.rangeSeparator)
  + .map(_val => _val.trim());
  }
  if (Array.isArray(value)) {
  _input = value;
  }
  - this._value = (_input as string[])
  - .map((_val: string): Date => {
  + this._value = _input
  + .map((_val: string | Date): Date => {
  if (this._picker._config.useUtc) {
  return utcAsLocal(
  parseDate(_val, this._picker._config.rangeInputFormat, this._localeService.currentLocale)
  