Release 0.20.2

[eddelbuettel]

This PR updates the package to release 0.20.2. From NEWS.md (with 'lowered' headline levels for display here):

tiledb 0.20.2

• This release of the R package builds against TileDB 2.16.1, and has also been tested against earlier releases as well as the development version

Improvements

• The column buffer allocation is now robust to container overflow sanitizer checks (Resize in lieu of just reserving #574)

• The array schema version is now accessible via a function (Expose an array schema version getter #575)

• Use of TileDB Embedded was upgraded to release 2.15.3 (Use TileDB 2.16.1 #576)

• The tile extend getter function is now able to access a wider range of possible values (Update tile_extent getter #577)

Build and Test Systems

• The minimal version of TileDB Embedded that can be used with the R package is now release 2.7.0 (Update the minimally supported TileDB Embedded version to release 2.7.0 #578)

[shortcut-integration]

This pull request has been linked to Shortcut Story #32286: R package release 0.20.2.