Update version format

-prerelease.[timestamp] is semver friendly. Move SHA info to package.json.

.travis.yml

@@ -22,8 +22,8 @@ after_script:
   ]]; then
     # Authenticate NPM
     echo "//registry.npmjs.org/:_authToken=\${NPM_TOKEN}" > .npmrc
-    # Set version to commit SHA
-    npm --no-git-tag-version version $(node -p -e "require('./package.json').version")-${TRAVIS_COMMIT:0:5}
+    # Set version to timestamp
+    npm --no-git-tag-version version $($(npm bin)/json -f package.json version)-prerelease.$(date +%s)
     npm publish
     # Publish to gh-pages as most recent committer
     git config --global user.email $(git log --pretty=format:"%ce" -n1)

package.json

@@ -13,9 +13,9 @@
   "scripts": {
     "prepublish": "./node_modules/.bin/webpack --bail",
     "start": "make serve",
-    "test": "make test"
+    "test": "make test",
+    "version": "./node_modules/.bin/json -f package.json -I -e \"this.repository.sha = '$(git log -n1 --pretty=format:%H)'\""
   },
-  "dependencies": {},
   "devDependencies": {
     "copy-webpack-plugin": "3.0.1",
     "eslint": "2.7.0",
@@ -23,6 +23,7 @@
     "gh-pages": "0.11.0",
     "highlightjs": "8.7.0",
     "htmlparser2": "3.9.0",
+    "json": "9.0.4",
     "json-loader": "0.5.4",
     "lodash.defaultsdeep": "4.6.0",
     "promise": "7.1.1",