Meson build file fixes

Author: peteruithoven

meson.build

@@ -1,6 +1,8 @@
 project(
-    'com.github.peteruithoven.resizer', 'vala', 'c',
-    meson_version : '>= 0.43'
+    'com.github.peteruithoven.resizer',
+    ['vala', 'c'],
+    meson_version : '>= 0.43',
+    license: 'GPL-2.0+'
 )
 
 # Create config.vala from config.vala.in,