Override the cssparser dependency from sass-compiler (#13532)
vaadin-sass-compiler depends on an older version of cssparser than the
one used in client-compiler. This change overrides all sass-compiler
provided cssparser deps with the newer version.
Change-Id: I06d2b957d66dd3abbef161ae2643eec0cdf7e13a
Remove theme-compiler and replace with external vaadin-sass-compiler
* Moves CompileTheme from the theme-compiler to buildhelpers
* Refactors CompileTheme to get the Vaadin version on the command line
instead of using the Version class found in vaadin-shared
* Refactors build scripts to pass the version number on the command line
when running CompileTheme
* Removes the theme-compiler module/project/whatchamacallit
* Replaces the theme-compiler dependency with vaadin-sass-compiler 0.9.0
from maven
Change-Id: I4f98d15b60e18a826bf264eb55d12b3e736e8e54