Gspread

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* Fix Python 2 `SyntaxError` in models.py 751 (752)

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* Fix `TypeError` when using gspread in google colab (750)

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* Remove `oauth2client` in favor of `google-auth` 472, 529 (637 by BigHeadGeorge)
* Convert `oauth2client` credentials to `google-auth` (711 by aiguofer)
* Remove unnecessary `login()` from `gspread.authorize`

* Fix sheet name quoting issue (554, 636, 716):
* Add quotes to worksheet title for get_all_values (640 by grlbrwrg, 717 by zynaxsoft)
* Escaping title containing single quotes with double quotes (730 by vijay-shanker)
* Use `utils.absolute_range_name()` to handle range names (748)

* Fix `numericise()`: add underscores test to work in python2 and <python3.6 (622 by epicfaace)

* Add `supportsAllDrives` to Drive API requests (709 by justinr1234)

* Add `Worksheet.merge_cells()` (713 by lavigne958)
* Improve `Worksheet.merge_cells()` and add `merge_type` parameter (742 by aiguofer)

* Add `Worksheet.sort()` (639 by kirillgashkov)

* Add ability to reorder worksheets 570 (571 by robin900)
* Add `Spreadsheet.reorder_worksheets()`
* Add `Worksheet.update_index()`

* Add `test_update_cell_objects` (698 by ogroleg)

* Add `Worksheet.append_rows()` (556 by martinwarby, 694 by fabytm)

* Add `Worksheet.delete_rows()` (615 by deverlex)

* Add Python 3.8 to Travis CI (738 by artemrys)

* Speed up `Client.open()` by querying files by title in Google Drive (684 by aiguofer)

* Add `freeze`, `set_basic_filter` and `clear_basic_filter` methods to `Worksheet` (574 by aiguofer)

* Use Drive API v3 for creating and deleting spreadsheets (573 by aiguofer)

* Implement `value_render_option` in `get_all_values` (648 by mklaber)

* Set position of a newly added worksheet (688 by djmgit)
* Add url properties for `Spreadsheet` and `Worksheet` (725 by CrossNox)

* Update docs: "APIs & auth" menu deprecation, remove outdated images in oauth2.rst (706 by manasouza)

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* Support old and new collections.abc.Sequence in `utils` (745 by timgates42)

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* Added `Spreadsheet.values_batch_update()` (731)
* Added:
* `Worksheet.get()`
* `Worksheet.batch_get()`
* `Worksheet.update()`
* `Worksheet.batch_update()`
* `Worksheet.format()`

* Added more parameters to `Worksheet.append_row()` (719 by lobatt, 726)
* Fix usage of client.openall when a title is passed in (572 by aiguofer)

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* Fixed `gspread.utils.cell_list_to_rect()` on non-rect cell list (613 by skaparis)
* Fixed sharing from Team Drives (646 by wooddar)
* Fixed KeyError in list comprehension in `Spreadsheet.remove_permissions()` (643 by wooddar)
* Fixed typos in docstrings and a docstring type param (690 by pedrovhb)
* Clarified supported Python versions (651 by hugovk)
* Fixed the Exception message in `APIError` class (634 by lordofinsomnia)
* Fixed IndexError in `Worksheet.get_all_records()` (633 by AivanF)

* Added `Spreadsheet.values_batch_get()` (705 by aiguofer)