Change list

Per appium/appium#13747, add support for viewmatcher along with test for datamatcher

Types of changes

• No changes in production code.
• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Details

Similar to dataMatcher, provides a functionality for viewMatcher. Also I noticed that dataMatcher had no test, so I added one for dataMatcher as well.