Added 'test-es' script to package.json.

Author: sumtype

package.json

@@ -6,7 +6,8 @@
  "scripts": {
  "transpile-es5": "node_modules/.bin/shx rm -rf ./algorithms/es5 && node_modules/.bin/shx rm -rf ./test/es5 && node_modules/.bin/shx rm -f ./es5.js && node_modules/.bin/babel ./es.js -o ./es5.js --plugins=babel-plugin-transform-es2015-modules-umd --no-comments && node_modules/.bin/babel ./algorithms/es -d ./algorithms/es5 --plugins=babel-plugin-transform-es2015-modules-umd --no-comments && node_modules/.bin/babel ./test/es -d ./test/es5 --no-comments && node_modules/.bin/replace '/es/' '/es5/' ./es5.js -q && node_modules/.bin/replace 'global.es' 'global.algorithms' ./es5.js -q && node_modules/.bin/replace '../../es' '../../es5' ./test/es5 -r -q && node_modules/.bin/replace 'Algorithm:' 'ES5 Algorithm:' ./test/es5 -r -q && node_modules/.bin/standard --fix --global self --global define --global it --global describe",
  "coverage": "node_modules/.bin/nyc --require babel-register node_modules/.bin/_mocha ./test/es/*.js && node_modules/.bin/nyc report --reporter=text-lcov | node_modules/.bin/coveralls",
- "test": "npm run transpile-es5 && node_modules/.bin/nyc --require babel-register node_modules/.bin/_mocha ./test/**/*.js"
+ "test": "npm run transpile-es5 && node_modules/.bin/nyc --require babel-register node_modules/.bin/_mocha ./test/**/*.js",
+ "test-es": "node_modules/.bin/nyc --require babel-register node_modules/.bin/_mocha ./test/es/*.js"
  },
  "repository": {
  "type": "git",