Update dependencies

Closes #31. Closes #40.

package.json

@@ -35,22 +35,22 @@
   "license": "BSD-3-Clause",
   "dependencies": {
     "@babel/standalone": "7.0.0-beta.32",
-    "acorn": "5.2.1",
+    "acorn": "5.5.3",
     "babylon": "7.0.0-beta.32",
     "benchmark": "^2.1.4",
-    "buble": "0.17.3",
+    "buble": "0.19.3",
     "chai": "4.1.2",
-    "coffeescript": "2.0.2",
+    "coffeescript": "2.2.3",
     "compute-gmean": "^1.1.0",
-    "espree": "3.5.2",
+    "espree": "3.5.4",
     "esprima": "4.0.0",
     "jshint": "2.9.5",
     "lebab": "2.7.7",
-    "prepack": "0.2.11",
-    "prettier": "1.8.2",
+    "prepack": "0.2.25",
+    "prettier": "1.9.2",
     "source-map": "0.6.1",
     "string-align": "^0.2.0",
-    "typescript": "2.6.1",
+    "typescript": "2.7.2",
     "virtualfs": "^1.0.0"
   },
   "devDependencies": {