Update (and test for) internal properties on change

[alifeee]

Closes #1201
Many internal properties were not updated
These updates were also not tested for in the tests.
More info in #1201

[alifeee]

Currently this line fails.

new_sheet.hide() calls hide()

this calls _set_hidden_flag(True)

this sets _properties["hidden"] to True. I verify this happens via print()

Then, isSheetHidden attempts to get "hidden" prop.

ok, I figured out the problem was that in the test_hide_show_worksheet test, a sheet is added, and the new sheet is hidden/shown. The properties were of the old sheet. Fixed. I will leave this comment here.

[lavigne958]

Looks Good To Me

[alifeee]

Here are all @propertys of gspread.Worksheet.

Worksheet properties - what changes them - whether this method updates local prop: ✅/❌

• id - not updated
• title - update_title - ✅
• url - not updated
• index - update_index - ✅
• isSheetHidden - _set_hidden_flag - ✅
• updated - deprecated
• row_count - resize - ✅
• col_count - resize - ✅
• frozen_row_count - freeze - ✅
• frozen_col_count - freeze - ✅
• is_gridlines_hidden - _set_gridlines_hidden_flag - ✅
• tab_color - update_tab_color - ✅