refactor(manager): Fix lint warnings (#7116)

lib/manager/bundler/artifacts.ts

lib/manager/bundler/extract.ts

lib/manager/common.ts

lib/manager/composer/artifacts.ts

lib/manager/gomod/update.ts

lib/manager/helm-values/extract.ts

lib/manager/homebrew/update.ts

lib/manager/maven/extract.ts

lib/manager/npm/post-update/index.ts

lib/manager/npm/post-update/node-version.ts

lib/manager/npm/update.ts

lib/manager/nuget/extract.ts

lib/manager/pip_requirements/artifacts.ts

lib/manager/pip_requirements/extract.ts

lib/manager/pipenv/artifacts.ts

lib/manager/pipenv/extract.ts

lib/manager/poetry/artifacts.ts

lib/manager/regex/index.ts

lib/manager/travis/package.ts