chore: update to 7.0.0-beta.24 with changelog (angular#1039)

chore: update to 7.0.0-beta.23 with changelog (angular#968)

chore: update to 7.0.0-beta.22 with changelog (angular#934)

chore: update to 7.0.0-beta.21 with changelog (angular#917)

chore: update to 7.0.0-beta.20 with changelog (angular#913)

feat: upgrade to TypeScript v3.1 (angular#860)

* Upgrade apps to Angular CLI v7
* Update versions in package.json to v7 for Angular and Material
* Update to TypeScript v3.1 and change the MatchMedia interface
  to match updated spec

chore: update to 6.0.0-beta.18 with changelog (angular#829)

chore: bump changelog to 6.0.0-beta.17 (angular#811)

chore(package): update version to beta.16

chore(package): update version to beta.15