move semver back to dev deps

Author: GaryWilber

package.json

@@ -37,12 +37,12 @@
     "jshint": "^2.10.1",
     "mocha": "^5.2.0",
     "node-gyp": "^9.1.0",
+    "semver": "^7.3.7",
     "toolkit-jsdoc": "^1.0.0"
   },
   "dependencies": {
     "bindings": "^1.3.1",
-    "nan": "^2.16.0",
-    "semver": "^7.3.7"
+    "nan": "^2.16.0"
   },
   "engines": {
     "node": ">=6.0.0"