Handle QML / QMake files (#40)

* Add support for QML files

QML information:

- reference: https://doc.qt.io/qt-5/qmlreference.html
- comment syntax: https://doc.qt.io/qt-5/qtqml-syntax-basics.html#comments

* Add support for qmake project files

Comment syntax reference: https://doc.qt.io/qt-5/qmake-project-files.html#comments

contrib/syntax.yml

@@ -67,6 +67,20 @@ javacript:
     close:  ' */\n\n'
     prefix: ' * '
 
+qml:
+  ext: ['.qml']
+  comment:
+    open:   '/*\n'
+    close:  ' */\n\n'
+    prefix: ' * '
+
+qmake_project:
+  ext: ['.pro']
+  comment:
+    open:   '#\n'
+    close:  '#\n'
+    prefix: '# '
+
 css:
   ext: ['.css']
   comment: