chore(package): update remark to version 12.0.0

Closes #48

Author: greenkeeper[bot]

packages/remark-bemjson/package.json

@@ -34,7 +34,7 @@
   "homepage": "https://github.com/bem-contrib/md-to-bemjson/packages/remark-bemjson#readme",
   "devDependencies": {
     "node-eval": "^2.0.0",
-    "remark": "^10.0.0",
+    "remark": "^12.0.0",
     "vfile": "^4.0.0"
   },
   "dependencies": {