prepping for v2.0.0

Author: dmolsen

composer.json

@@ -24,9 +24,9 @@
 		"source":         "https://github.com/pattern-lab/styleguidekit-twig-default/releases"
 	},
 	"require": {
-		"pattern-lab/core": "0.*",
-		"pattern-lab/patternengine-twig": "0.*",
-		"pattern-lab/styleguidekit-assets-default": "0.*",
-		"twig/twig": "1.*"
+		"pattern-lab/core": "^2.0.0",
+		"pattern-lab/patternengine-twig": "^2.0.0",
+		"pattern-lab/styleguidekit-assets-default": "^2.0.0",
+		"twig/twig": "~1.0"
 	}
-}
+}