Deps refresh & migration link

README.md

@@ -9,6 +9,8 @@
 
 __[Live demo](https://markdown-it.github.io)__
 
+__v4.+ changed internals! Plugins need update. See [migration details](https://github.com/markdown-it/markdown-it/blob/master/docs/4.0_migration.md)__
+
 - Supports the CommonMark spec + syntax extensions + sugar (URL autolinking, typographer).
 - Configurable syntax! You can add new rules and even replace existing ones.
 - High speed!

package.json

@@ -22,14 +22,14 @@
     "entities": "~1.1.1",
     "linkify-it": "~0.1.2",
     "mdurl": "~1.0.0",
-    "uc.micro": "~ 0.1.0"
+    "uc.micro": "^1.0.0"
   },
   "devDependencies": {
     "ansi": "~0.3.0",
     "autoprefixer-stylus": "~0.5.0",
     "benchmark": "~1.0.0",
     "browserify": "*",
-    "chai": "~2.1.0",
+    "chai": "^2.1.0",
     "commonmark": "~0.18.1",
     "coveralls": "~2.11.2",
     "eslint": "0.13.0",