Use yarn (#10)

.gitignore

@@ -2,3 +2,11 @@ build/
 coverage/
 node_modules/
 tmp/
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*

.npmignore

@@ -11,3 +11,11 @@ tmp
 .gitignore
 .istanbul.yml
 .travis.yml
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*

.travis.yml

@@ -1,4 +1,13 @@
 language: node_js
 node_js:
   - "8"
-script: ./node_modules/.bin/polkadot-dev-build-travis build check coveralls npm test
+cache:
+  yarn: true
+  directories:
+    - node_modules
+before_install:
+  - npm install -g yarn --cache-min 999999999
+install:
+  - yarn
+script:
+  - ./node_modules/.bin/polkadot-dev-build-travis build check coveralls publish test

package.json

@@ -30,13 +30,13 @@
     "test": "jest --coverage src"
   },
   "devDependencies": {
-    "@polkadot/dev": "^0.2.3"
+    "@polkadot/dev": "^0.3.1"
   },
   "dependencies": {
-    "@polkadot/api-format": "~0.3.6",
-    "@polkadot/api-provider": "~0.1.5",
-    "@polkadot/jsonrpc": "~0.3.7",
-    "@polkadot/util": "~0.5.5",
+    "@polkadot/api-format": "~0.3.7",
+    "@polkadot/api-provider": "~0.1.6",
+    "@polkadot/jsonrpc": "~0.3.9",
+    "@polkadot/util": "~0.5.6",
     "babel-runtime": "^6.26.0"
   }
 }