upgrade to prettier 2 (#5051)

.prettierrc.yml

badge-maker/lib/badge-cli.spec.js

badge-maker/lib/badge-renderers.js

badge-maker/lib/index.js

badge-maker/lib/index.spec.js

badge-maker/lib/make-badge.spec.js

core/badge-urls/make-badge-url.spec.js

core/base-service/auth-helper.spec.js

core/base-service/base-graphql.spec.js

core/base-service/base-json.spec.js

core/base-service/base-svg-scraping.spec.js

core/base-service/base-xml.spec.js

core/base-service/base-yaml.spec.js

core/base-service/base.js

core/base-service/base.spec.js

core/base-service/cache-headers.js

core/base-service/cache-headers.spec.js

core/base-service/check-error-response.js

core/base-service/check-error-response.spec.js

core/base-service/coalesce-badge.spec.js