Prepare v4.5.0

[ffoodd]

• Run linters;
• Run compilers;
• Run tests;
• Check documentation site: examples and contents;
• Test cross-browser compatibility locally and with BrowserStack:
  • Firefox ESR
  • IE11
  • Latest Edge, Chrome, Firefox, Safari
  • iOS Safari
  • Chrome & Firefox on Android
• Including RTL mode;
• Ask for reviews and accessibility testing;
• sync with Bootstrap's release and probably wait for it (have a look at Bootstrap #30709)
• npm run release-version 4.4.1 4.5.0 to bump version number
• npm run release to compile dist, update SRI hashes in doc and package the release
• Prepare changelog:
  • conventional-changelog -p angular -i CHANGELOG.md -s
  • and probably maintain a ship list: fixes v4.5.0 — ship list #376
• commit and push dist with a chore(release) commit message
• merge (on v4-dev for now)
• tag your version
• create a GitHub release:
  • attach zip file
  • paste CHANGELOG in the release's description
• publish documentation on gh-pages
  • copy _gh_pages/ top level files (index.html, redirects.json, sitemap.xml…) and _gh_pages/docs/4.5 to the gh-pages branch
  • ensure Algolia indexes new release content (probably requires a PR)
  • when bumping minor version: ensure dist URLs in examples' HTML has changed
• npm pack then npm publish
• publish on Nuget (@Lausselloic)
• check release on NPM, Nuget, Packagist…