Added internal support for Google Sheets API v4, fixing stability problems with loading data from spreadsheets.
UPGRADE NOTESEXPANDCOLLAPSE
Existing setups with Google Sheets stopped working in August 2021 as Google phased out version 3 of their Google Sheets API. Highcharts has now been upgraded to version 4 of the API, but this will not work unless an API key is given in the data.googleAPIKey option. See the comprehensive tutorial from Hands-On Data Visualization on how to obtain the key. Additionally, data.googleSpreadsheetWorksheet is deprecated and replaced by data.googleSpreadsheetRange, which allows for more detailed instructions on what data to load.
1 BUGFIXESEXPANDCOLLAPSE
Fixed #16231, a regresssion in v9.2 causing exporting not to work with styledMode enabled.