drop ci support for < node8

Author: cmawhorter

.travis.yml

@@ -1,40 +1,5 @@
 jobs:
   include:
-    - language: node_js
-      node_js: 0.12
-
-    - name: "Node.js: 4"
-      language: minimal
-      install:
-        - nvm install 4
-        # Yarn v1.12.3 is last *known* version to work on node v4/v5
-        # See: https://github.com/yarnpkg/yarn/issues/6914
-        - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 1.12.3
-        - export PATH="$HOME/.yarn/bin:$PATH"
-        - yarn version
-      script:
-        - yarn
-        - yarn run test
-
-    - name: "Node.js: 5"
-      language: minimal
-      install:
-        - nvm install 5
-        # Yarn v1.12.3 is last *known* version to work on node v4/v5
-        # See: https://github.com/yarnpkg/yarn/issues/6914
-        - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 1.12.3
-        - export PATH="$HOME/.yarn/bin:$PATH"
-        - yarn version
-      script:
-        - yarn
-        - yarn run test
-
-    - language: node_js
-      node_js: 6
-
-    - language: node_js
-      node_js: 7
-
     - language: node_js
       node_js: 8
 

README.md

@@ -6,6 +6,8 @@ Yes, it's true that RFC2141 is deprecated (replaced by URI), but urn is still a
 
 No dependencies.  Has tests.  PRs welcome.
 
+Should work in node v0.12-13+.
+
 ## Getting started
 
 ```sh
@@ -137,3 +139,13 @@ console.log('valid', arn.validate(valid)); // => valid null
 var china = arn.parse('arn:aws-cn:autoscaling:us-east-1:123456789012:scalingPolicy:c7a27f55-d35e-4153-b044-8ca9155fc467:autoScalingGroupName/my-test-asg1:policyName/my-scaleout-policy');
 console.log('invalid', arn.validate(china)); // => invalid [ 'validation failed for partition: the China partition is unsupported' ]
 ```
+
+## Release notes
+
+### `1.2.0`
+
+Because of build changes and dropping support (in CI) for older node versions I did a minor bump. Nothing has really changed under the hood though.
+
+- bumped dev dependencies
+- drop CI support for very old node. node versions: 0.12, 4, 5, 6, 7. (Note: urn-lib 1.1.x worked with those versions and nothing has changed to break that support. they're just no longer part of CI. if you find a problem with >= 0.12 open an issue)
+- improve build process

package.json

@@ -11,11 +11,11 @@
     "url": "http://www.mawhorter.net/"
   },
   "scripts": {
-    "prebuild": "yarn run lint && yarn run test",
+    "prebuild": "npm run lint && npm run test",
     "build": "rollup -c",
     "postbuild": "node ./scripts/assert-build.js",
     "lint": "eslint ./src",
-    "coverage": "nyc --reporter=html yarn run test",
+    "coverage": "nyc --reporter=html npm run test",
     "test": "mocha -r ./test/lib/helper test"
   },
   "repository": {