Return the property value range in getInfoAtPos() api.
simple unit test
'enhanced' the test data
updated unit test data
Merge branch 'master' into rlim/range-in-css-info
update range unit tests
Fix all CSS Context Info unit tests by adding range info.
rtc: spelling errors
Handle ranges for empty property values and fix some more unit tests.
And also address two review feedbacks.
Fix another feedback.
Merge pull request #7390 from adobe/rlim/range-in-css-info

Return the css property value range in getInfoAtPos() api.