Bump plugin version to 5.3.0-rc.1

[jorgefilipecosta]

Features

• Add the block management modal: Ability to hide/show blocks in the inserter.
• Support nested blocks for the Cover Block.
• Add an experimental Legacy Widget Block (enabled only in the plugin for the moment).

Enhancements

• Update the block outlines for the hover and selected states.
• Allow undoing automatic pattern block transformations.
• Add a RichText collapsed format toolbar for code, inline image and strikethrough formats.
• Allow collapsing inserter panels when searching.
• Add ability to transform video shortcodes to video blocks.
• Add ability to transform audio shortcodes to audio blocks.
• Add new @wordpress/data actions to invalidate the resolvers cache.
• Support custom classNames in the ToggleControl component.
• Clarify the button to exit the post lock modal.
• Improve the block validation error message.
• Automatically use the WordPress babel config when using @wordpress/scripts CLI.
• Add keyboard shortcuts to indent/outdent list items.
• Use links instead of buttons in the document outline.
• Use <s> for strikethrough, not <del>.
• Center the tooltips content.
• Update wording of the block switcher tooltip.
• Add support for the reduced motion browser mode.

Bug Fixes

• Always show the current month in the Calendar block for All CPTs but post.
• In the Latest posts block, avoid full line clickable titles.
• Avoid relying on DOM nodes to add the empty line in RichText component. This fixes a number of lingering empty lines.
• Fix the MediaPlaceholder icon color on dark backgrounds.
• Fix the Classic block toolbar in RTL languages.
• Fix the more tag in the Classic block.
• Fix the quote to heading block transformation.
• Fix “null” appearing when merging empty headings and paragraphs.
• Fix the block insertion restrictions in the global inserter.
• Fix the prepareEditableTree custom RichText Format API.
• Changes to the internal RichText format representation to separate objects (inline image..) from formats (bold…). This fixes a number of RichText issues.
• Fix the Spinner component styling in RTL languages.
• Fix focus loss when using the Set Featured Image buttons.
• Fix template lock not being taken into consideration.
• Fix composed characters at the beginning of RichText.
• Fix several block multi-selection bugs.
• Allow using a float number as a step when using the RangeControl component.
• Fix error when pasting a caption shortcode without an image tag.
• Fix focus loss when combining sidebars and modals (or popovers).
• Escape the greater than character when serializing the blocks content into HTML.
• Fix pasting links into the classic block.
• Include missing CSS in the classic block.

Documentation

• Enhance the i18n process documentation with a complete example.
• Add design guidelines to several components:
• The Button component
• The CheckboxControl component
• The MenuItemsChoice component.
• The MenuGroup component.
• Update the JavaScript setup tutorial to rely on the @wordpress/scripts package.
• Lowercase block editor and classic editor terms to conform to the copy guidelines.
• Use a central script to generate the JavaScript API documentation and run in parallel.
• Update the packages release process.
• Update the plugin release docs to rely on a lighter SVN checkout.
• Add automatic generation of JavaScript API documentation for:
  • @wordpress/element
  • @wordpress/escape-html
  • @wordpress/html-entities
  • @wordpress/keycodes
  • @wordpress/a11y
  • @wordpress/blob
  • @wordpress/block-library
  • @wordpress/compose
  • @wordpress/dom
  • @wordpress/i18n
  • @wordpress/autop
  • @wordpress/dom-ready
  • @wordpress/block-editor
  • @wordpress/rich-text
  • @wordpress/blocks
  • @wordpress/deprecated
  • @wordpress/priority-queue
  • @wordpress/shortcode
  • @wordpress/viewport
  • @wordpress/url
  • @wordpress/redux-routine
  • @wordpress/date
  • @wordpress/block-serialization-default-parser
  • @wordpress/plugins
  • @wordpress/wordcount
  • @wordpress/edit-post
• Link to the editor user documentation and remove the user documentation markdown file.
• Typos and tweaks: 1, 2, 3, 4, 5.

Various

• Upgrade to React 16.8.4 (React Hooks).
• Fix the dependencies of the e2e-tests and the e2e-test-utils npm packages.
• Avoid disabling regeneratorRuntime in the babel config to avoid globals in npm packages.
• Work on various e2e tests stability improvements.
• Regenerate RSS/Search block test fixtures.
• Move to travis.com as a CI server.
• Add clickBlockToolbarButton e2e test utility.
• Add e2e tests:
  • to check the keyboard navigation through blocks.
  • to verify that the default block is selected after removing all the blocks.
  • to check the InnerBlocks allowed blocks restrictions.
• Add unit tests for the isKeyboardEvent utility.
• Remove CC-BY-3.0 from the GPLv2 compatible licenses.
• Polish the @wordpress/block-editor module:
  • Move the block specific components to the package.
  • Update the classnames to follow the CSS guidelines.
• Update eslint rules npm packages.
• Simplify the hierarchical term selector strings.
• Update the Latest comments block to use the “align support config” instead of a custom implementation.
• Remove the block snapshots tests.
• Remove post install scripts and only run these in CI to improve test performance.
• Tweak the plugin build zip script to avoid prompting when the build environment is clean.
• Add withRegistry higher-order component to the @wordpress/data module.
• Add missing module entry point to the notices package.json.
• Remove the Gutenberg 5.3 deprecated functions.
• Ensure sourcemaps published to npm contain safe relative paths.
• Remove the replace_block filter usage and extend core editor settings instead.
• Improve handling of transpiled packages in unit tests.
• Add CLI arguments to launch e2e tests in interactive mode more easily.
• Select a unique radio input in a group when using the tabbables utility.

[youknowriad]

@jorgefilipecosta Seems like the indentation in the changelog (subitems) is not right. Also there are unnecessary empty lines between the changelog items.