[qa] Switched JS and CSS linting to prettier

Author: nemesifier

.github/workflows/ci.yml

@@ -74,7 +74,7 @@ jobs:
         sudo apt -qq -y install sqlite3 gdal-bin libproj-dev \
           libgeos-dev libspatialite-dev spatialite-bin \
           libsqlite3-mod-spatialite
-        sudo npm install -g jshint stylelint
+        sudo npm install -g prettier
         pip install -U pip wheel setuptools
         pip install -U -r requirements-test.txt
         pip install -U -e .