build: move common-tags to devDependencies

Author: Nathanael Dekeister

package.json

@@ -37,7 +37,6 @@
     "broccoli-debug": "^0.6.5",
     "broccoli-persistent-filter": "^3.1.2",
     "broccoli-plugin": "^4.0.3",
-    "common-tags": "^1.8.0",
     "ember-cli-babel-plugin-helpers": "^1.1.1",
     "ember-cli-version-checker": "^5.1.2",
     "fs-tree-diff": "^2.0.1",
@@ -63,6 +62,7 @@
     "broccoli-test-helper": "^2.0.0",
     "chai": "^4.3.4",
     "co": "^4.6.0",
+    "common-tags": "^1.8.0",
     "console-ui": "^3.1.2",
     "core-object": "^3.1.5",
     "ember-cli": "~3.25.2",