Not all supported providers are shown in README.md under "Supported CI tools"

[emanuelb]

in file:
https://github.com/watson/ci-info/blob/master/vendors.json

There are more providers then are listed under
https://github.com/watson/ci-info/blob/master/README.md#supported-ci-tools

for example both "Xcode Cloud" and "Xcode Server" are exists in vendors.json but not on the README.md file.

looks like a script that will check README.md against vendors.json to look for missing entries will help to add the missing entries and to ensure future commits/prs will include modification to the README.md file as well.