chore(deps): update dependency acorn to v5.2.1

Author: renovate[bot]

package.json

@@ -31,7 +31,7 @@
     "define-property": "1.0.0"
   },
   "devDependencies": {
-    "acorn": "5.2.0",
+    "acorn": "5.2.1",
     "clone-deep": "1.0.0",
     "eslint-config-standard-tunnckocore": "1.0.10",
     "espree": "3.5.1",

yarn.lock

@@ -52,9 +52,9 @@ acorn-jsx@^3.0.0:
   dependencies:
     acorn "^3.0.4"
 
-[email protected].0:
-  version "5.2.0"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.2.0.tgz#39fd0cf9d2dd4c82068602a404019d8ed5167b1c"
+[email protected].1:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.2.1.tgz#317ac7821826c22c702d66189ab8359675f135d7"
 
 acorn@^3.0.4:
   version "3.3.0"