update dependencies

- update dependencies that don't break current tests
- stricter versioning for dependencies
- add lock file for yarn
closes #18
update travis

.babelrc

@@ -1,4 +1,4 @@
 {
-  "presets": ["es2015"],
+  "presets": ["env"],
   "plugins": []
 }

.gitignore

@@ -7,3 +7,5 @@ coverage/
 .DS_Store
 npm-debug.log
 package-lock.json
+
+*.log

.travis.yml

@@ -3,6 +3,6 @@ node_js:
   - "node"
   - "6"
   - "5"
-  - "4.4"
+  - "4.8"
 script: "make test-ci"
-after_script: "npm install coveralls@2.11.9 && cat ./coverage/lcov.info | coveralls"
+after_script: "npm install coveralls@3.0.0 && cat ./coverage/lcov.info | coveralls"

package.json

@@ -30,15 +30,14 @@
   "license": "ISC",
   "homepage": "https://github.com/spirit-js/spirit",
   "devDependencies": {
-    "babel-cli": "^6.11.4",
-    "babel-preset-es2015": "^6.13.2",
-    "babel-register": "^6.11.6",
+    "babel-cli": "^6.26.0",
+    "babel-preset-env": "^1.6.1",
     "gitbook-cli": "^2.3.0",
-    "istanbul": "^1.0.0-alpha.2",
-    "jasmine": "2.8.x"
+    "istanbul": "^1.1.0-alpha.1",
+    "jasmine": "^3.1.0"
   },
   "dependencies": {
-    "bluebird": "3.5.x",
-    "mime": "1.3.x"
+    "bluebird": "~3.5.1",
+    "mime": "~1.3.6"
   }
 }