message: Add benchmark results to benchmarks.md
diff: @@ -27,3 +27,16 @@ test time_convert ... bench: 163 ns/iter (+/- 39)
  test uuid_body_parse ... bench: 1,464 ns/iter (+/- 227)
  test uuid_convert ... bench: 168 ns/iter (+/- 32)
  ```
  +
  +#### Collection types (List, Set, Map)
  +
  +```
  +test list_body_parse ... bench: 2,694 ns/iter (+/- 444)
  +test list_convert ... bench: 4,953 ns/iter (+/- 720)
  +test list_v4_body_parse ... bench: 2,578 ns/iter (+/- 933)
  +test list_v4_convert ... bench: 4,929 ns/iter (+/- 658)
  +test map_body_parse ... bench: 3,174 ns/iter (+/- 1,222)
  +test map_convert ... bench: 8,087 ns/iter (+/- 1,540)
  +test map_without_blob_body_parse ... bench: 3,787 ns/iter (+/- 772)
  +test map_without_blob_convert ... bench: 7,867 ns/iter (+/- 1,022)
  +```
  