blockly-v12.0.0-beta.6

@rachel-fenichel

What's Changed

fix!: delete marker move event and tests by @rachel-fenichel in #9013
fix!: delete ASTNode and references by @rachel-fenichel in #9014
fix!: delete IASTNodeLocation and friends by @rachel-fenichel in #9015
feat!: Make everything ISelectable focusable by @BenHenning in #9004
fix!: remove deprecated setEnabled and backwards event filtering by @maribethb in #9039
fix!: deepMerge for arrays, shortcut keycodes returned as array by @maribethb in #9047

fix: Don't fire events for changes to potential variables by @RoboErikG in #9025
fix: Improve robustness of IFocusableNode uses by @BenHenning in #9031
fix: don't visit connections with the cursor. by @gonfunko in #9030
fix: Fix regressions in Field. by @gonfunko in #9011
fix: Ensure selection stays when dragging blocks, comments, and bubbles by @BenHenning in #9034
fix: Ensure BlockSvg is uniquely focusable on the page by @BenHenning in #9045
fix: Ensure cursor syncs with more than just focused blocks by @BenHenning in #9032
fix: Reenable support for tabbing between fields. by @gonfunko in #9049
fix: fieldDropdown.getText works in node by @maribethb in #9048

Full Changelog: blockly-v12.0.0-beta.5...blockly-v12.0.0-beta.6