feat(datasource): convert to ts (#4183)

lib/datasource/cargo/index.ts

lib/datasource/common.ts

lib/datasource/dart/index.ts

lib/datasource/docker/index.ts

lib/datasource/git-tags/index.ts

lib/datasource/github/index.ts

lib/datasource/gitlab/index.ts

lib/datasource/go/index.ts

lib/datasource/gradle-version/index.ts

lib/datasource/hex/index.ts

lib/datasource/index.ts

lib/datasource/maven/index.ts

lib/datasource/maven/util.ts

lib/datasource/metadata.ts

lib/datasource/npm/get.ts

lib/datasource/npm/index.js

lib/datasource/npm/index.ts

lib/datasource/npm/npmrc.ts

lib/datasource/npm/presets.ts

lib/datasource/npm/releases.ts