fix: whitelist X-GitHub-SSO header in response (octokit#663)

fix: calculate content-length correctly for raw markdown request

fix: don’t pass `filePath` as query parameter

fix(package): update follow-redirects to version 1.2.6

fix: routes.json validation for project cards and columns

fix: TypeScript/Flow definitions

fix: adapt for mime@2

mime.lookup() is now mime.getType()

docs(CONTRIBUTING): Merging the Pull Request & releasing a new version

11.0.0 release

10.1.0 release