chore: workfront-api-constants should be a dep instead of devDep, deps upgrade

Author: bhovhannes

package.json

@@ -1,6 +1,6 @@
 {
   "name": "workfront-api",
-  "version": "1.3.1",
+  "version": "1.3.2",
   "description": "A Workfront API for the Node.js and the Web",
   "main": "index.js",
   "dependencies": {
@@ -25,7 +25,7 @@
     "http-server": "0.9.0",
     "nock": "8.0.0",
     "semver": "5.1.0",
-    "shelljs": "0.7.0",
+    "shelljs": "0.5.3",
     "sinon": "^1.12.2",
     "sinon-as-promised": "4.0.0",
     "sinon-chai": "2.8.0",