The revision number should increase automatically

[lifewithcoffee]

For a version text of [major].[minor].[patch].[revision], the last [revision] should only be maintained by the build script and never clear to zero.

Every time when executing the build script, the [revision] number increases one.

If the revision number contains a postfix, like "-preview", the postfix will remained, i.e. for version "1.3.2.1-preview2", after build, the version will become "1.3.2.2-preview2"