Added ability to build on Circle CI

.travis.yml

@@ -1,28 +0,0 @@
-{
-  "language": "node_js",
-  "node_js": [
-    "node"
-  ],
-  "script": [
-    "npm run test",
-    "npm run prettify ; echo 'checking if prettier changed something' ; git diff-index --name-only HEAD ; git diff HEAD ; git diff-index --quiet HEAD && echo 'ok' || (echo 'pretier modified contents, please run prettier locally and add changes. exitting...' && exit 1)"
-  ],
-  "before_deploy": "npm run pack",
-  "deploy": {
-    "provider": "releases",
-    "api_key": {
-      "secure": "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"
-    },
-    "file_glob": true,
-    "file": "packed/*",
-    "skip_cleanup": true,
-    "on": {
-      "tags": true
-    }
-  },
-  "after_script": [
-    'npm install --global slackup',
-    'npm run pack',
-    './scripts/slack.js'
-  ]
-}

circle.yml

@@ -0,0 +1,17 @@
+machine:
+  node:
+    version: 6.1.0
+
+deployment:
+  pack:
+    branch: /.*/
+    commands:
+      - npm run pack
+  release:
+    tag: /.*/
+    commands:
+      - ghr -t $GITHUB_TOKEN -u $CIRCLE_PROJECT_USERNAME -r $CIRCLE_PROJECT_REPONAME packed/
+
+dependencies:
+  pre:
+    - go get github.com/tcnksm/ghr