Upgrade TypeScript to v4

[sirreal]

Description

Upgrade TypeScript dependency to version 4.

Read the announcement here.

Applies a new feature noEmit with incremental to the bin/ directory typings. These typings were discarded before, this change prevents them from being produced at all.

How has this been tested?

Types continue to be generated as expected. The following completes without issues:

npm run clean:package-types
npm run build:package-types
npm run build:package-types

Types are generated as expected, e.g. packages/warning/build-types/index.d.ts:

/**
 * Shows a warning with `message` if environment is not `production`.
 *
 * @param {string} message Message to show in the warning.
 *
 * @example
 * ```js
 * import warning from '@wordpress/warning';
 *
 * function MyComponent( props ) {
 *   if ( ! props.title ) {
 *     warning( '`props.title` was not passed' );
 *   }
 *   ...
 * }
 * ```
 */
export default function warning(message: string): void;
//# sourceMappingURL=index.d.ts.map

Types of changes

Internal.

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR.

[github-actions]

Size Change: +149 B (0%)

Total Size: 1.18 MB

Filename	Size	Change
build/annotations/index.js	3.52 kB	-4 B (0%)
build/blob/index.js	668 B	+48 B (7%)	🔍
build/block-directory/index.js	8.55 kB	-57 B (0%)
build/block-editor/index.js	129 kB	-138 B (0%)
build/block-editor/style-rtl.css	10.9 kB	-16 B (0%)
build/block-editor/style.css	10.9 kB	-16 B (0%)
build/block-library/editor-rtl.css	8.65 kB	+42 B (0%)
build/block-library/editor.css	8.65 kB	+43 B (0%)
build/block-library/index.js	135 kB	+50 B (0%)
build/block-library/style-rtl.css	7.66 kB	+3 B (0%)
build/block-library/style.css	7.65 kB	+3 B (0%)
build/block-serialization-default-parser/index.js	1.78 kB	+1 B
build/blocks/index.js	47.5 kB	-3 B (0%)
build/components/index.js	169 kB	+139 B (0%)
build/components/style-rtl.css	15.3 kB	-63 B (0%)
build/components/style.css	15.3 kB	-64 B (0%)
build/compose/index.js	9.42 kB	+2 B (0%)
build/core-data/index.js	12 kB	-2 B (0%)
build/data-controls/index.js	685 B	-585 B (85%)	🏆
build/data/index.js	8.6 kB	+189 B (2%)
build/edit-navigation/index.js	10.7 kB	-2 B (0%)
build/edit-post/index.js	306 kB	+251 B (0%)
build/edit-post/style-rtl.css	6.29 kB	+37 B (0%)
build/edit-post/style.css	6.27 kB	+38 B (0%)
build/edit-site/style-rtl.css	3.84 kB	+56 B (1%)
build/edit-site/style.css	3.84 kB	+57 B (1%)
build/edit-widgets/index.js	21.2 kB	+103 B (0%)
build/editor/index.js	45.5 kB	+9 B (0%)
build/editor/style-rtl.css	3.85 kB	+17 B (0%)
build/editor/style.css	3.84 kB	+20 B (0%)
build/element/index.js	4.44 kB	+1 B
build/escape-html/index.js	734 B	+1 B
build/format-library/index.js	7.49 kB	-3 B (0%)
build/is-shallow-equal/index.js	710 B	+1 B
build/keyboard-shortcuts/index.js	2.39 kB	-4 B (0%)
build/media-utils/index.js	5.12 kB	-1 B
build/nux/index.js	3.27 kB	-1 B
build/plugins/index.js	2.44 kB	-1 B
build/priority-queue/index.js	790 B	+1 B
build/rich-text/index.js	13 kB	-3 B (0%)
build/server-side-render/index.js	2.6 kB	-2 B (0%)
build/shortcode/index.js	1.7 kB	+1 B
build/url/index.js	4.06 kB	+2 B (0%)
build/warning/index.js	1.13 kB	-1 B

ℹ️ View Unchanged

Filename	Size	Change
build/a11y/index.js	1.14 kB	0 B
build/api-fetch/index.js	3.35 kB	0 B
build/autop/index.js	2.72 kB	0 B
build/block-directory/style-rtl.css	943 B	0 B
build/block-directory/style.css	942 B	0 B
build/block-library/theme-rtl.css	741 B	0 B
build/block-library/theme.css	741 B	0 B
build/block-serialization-spec-parser/index.js	3.1 kB	0 B
build/date/index.js	31.9 kB	0 B
build/deprecated/index.js	772 B	0 B
build/dom-ready/index.js	568 B	0 B
build/dom/index.js	4.42 kB	0 B
build/edit-navigation/style-rtl.css	868 B	0 B
build/edit-navigation/style.css	871 B	0 B
build/edit-site/index.js	20.4 kB	0 B
build/edit-widgets/style-rtl.css	3 kB	0 B
build/edit-widgets/style.css	3 kB	0 B
build/editor/editor-styles-rtl.css	492 B	0 B
build/editor/editor-styles.css	493 B	0 B
build/format-library/style-rtl.css	547 B	0 B
build/format-library/style.css	548 B	0 B
build/hooks/index.js	1.74 kB	0 B
build/html-entities/index.js	621 B	0 B
build/i18n/index.js	3.54 kB	0 B
build/keycodes/index.js	1.85 kB	0 B
build/list-reusable-blocks/index.js	3.02 kB	0 B
build/list-reusable-blocks/style-rtl.css	476 B	0 B
build/list-reusable-blocks/style.css	476 B	0 B
build/notices/index.js	1.69 kB	0 B
build/nux/style-rtl.css	671 B	0 B
build/nux/style.css	668 B	0 B
build/primitives/index.js	1.34 kB	0 B
build/redux-routine/index.js	2.85 kB	0 B
build/token-list/index.js	1.24 kB	0 B
build/viewport/index.js	1.74 kB	0 B
build/wordcount/index.js	1.17 kB	0 B

_{compressed-size-action}

[sirreal]

Rebased and upgraded to latest 4.0.3.

[ockham]

Looking good and testing well! One note, otherwise good to merge!