Prepare 0.4.8 release

Author: zargony

package.json

@@ -1,8 +1,13 @@
 {
   "name": "language-rust",
-  "version": "0.4.7",
+  "version": "0.4.8",
   "description": "Rust language support in Atom",
-  "keywords": ["rust", "language", "grammar", "syntax"],
+  "keywords": [
+    "rust",
+    "language",
+    "grammar",
+    "syntax"
+  ],
   "license": "MIT",
   "engines": {
     "atom": ">0.50.0 <2.0.0"