feat(utils): convert to ts (#4237)

lib/datasource/cargo/index.ts

lib/datasource/docker/index.ts

lib/datasource/github/index.ts

lib/datasource/pypi/index.ts

lib/datasource/rubygems/get.ts

lib/platform/github/gh-got-wrapper.ts

lib/util/env.ts

lib/util/got/auth.ts

lib/util/got/cache-get.ts

lib/util/got/common.ts

lib/util/got/host-rules.ts

lib/util/got/index.ts

lib/util/got/renovate-agent.ts

lib/util/got/stats.ts

lib/util/got/util.ts

lib/util/ignore.ts

lib/util/mask.ts

lib/util/package-rules.ts

test/datasource/dart.spec.ts

test/datasource/github.spec.ts