Add --harmony flag to scripts so karl will work also with node 0.12

.travis.yml

@@ -2,6 +2,7 @@ language: node_js
 node_js:
   - stable
   - '4.0.0'
+  - '0.12'
 sudo: false
 deploy:
   provider: npm

package.json

@@ -4,11 +4,11 @@
   "description": "Very fast and simplistic logger that logs to the console.",
   "main": "./lib/karl.js",
   "scripts": {
-    "test": "node_modules/mocha/bin/mocha --require test/support/env --bail --reporter spec --check-leaks test/",
-    "test-ci": "istanbul cover node_modules/mocha/bin/_mocha --report lcovonly -- --require test/support/env --reporter spec --check-leaks test/",
-    "test-cov": "istanbul cover node_modules/mocha/bin/_mocha -- --require test/support/env --reporter spec --check-leaks test/",
-    "check-coverage": "istanbul check-coverage --statements 100 --lines 100 --functions 100 --branches 100",
-    "benchmark": "node benchmarks/benchmark",
+    "test": "node_modules/mocha/bin/mocha --harmony --require test/support/env --bail --reporter spec --check-leaks test/",
+    "test-ci": "istanbul cover node_modules/mocha/bin/_mocha --report lcovonly -- --harmony --require test/support/env --reporter spec --check-leaks test/",
+    "test-cov": "istanbul cover node_modules/mocha/bin/_mocha -- --harmony --require test/support/env --reporter spec --check-leaks test/",
+    "check-coverage": "istanbul check-coverage --harmony --statements 100 --lines 100 --functions 100 --branches 100",
+    "benchmark": "node --harmony benchmarks/benchmark",
     "make-docs": "./node_modules/.bin/jsdoc -c jsdoc.conf",
     "check-style": "./node_modules/jscs/bin/jscs .",
     "code-analysis": "./node_modules/jshint/bin/jshint ."
@@ -18,7 +18,7 @@
     "url": "https://github.com/KurtPattyn/karl.git"
   },
   "engines": [
-    "node >=4.0.0"
+    "node >=0.12"
   ],
   "devDependencies": {
     "bunyan": "^1.4.0",