fix: publish just lib folder

circle.yml

@@ -7,4 +7,5 @@ deployment:
     branch: master
     commands:
       # not every commit is going to be published
+      - npm run size
       - npm run semantic-release || true

package.json

@@ -7,7 +7,8 @@
     "release": "releaser",
     "test": "NODE_ENV=test mocha",
     "watch": "NODE_ENV=test mocha --watch",
-    "semantic-release": "semantic-release pre && npm publish && semantic-release post"
+    "semantic-release": "semantic-release pre && npm publish && semantic-release post",
+    "size": "t=\"$(npm pack .)\"; wc -c \"${t}\"; tar tvf \"${t}\"; rm \"${t}\";"
   },
   "repository": {
     "type": "git",
@@ -18,6 +19,7 @@
     "releasing",
     "versioning"
   ],
+  "files": ["lib"],
   "author": "Loren Norman <[email protected]>",
   "license": "MIT",
   "bugs": {