Move some devDependencies to the correct place

package.json

@@ -60,14 +60,14 @@
     "gulp-transform": "^3.0.5",
     "mocha": "^8.2.0",
     "morgan": "1.7.0",
-    "sinon": "1.17.6"
+    "sinon": "1.17.6",
+    "@babel/preset-env": "^7.12.1",
+    "eslint": "^7.12.0"
   },
   "engines": {
     "node": ">=4"
   },
   "dependencies": {
-    "@babel/preset-env": "^7.12.1",
-    "eslint": "^7.12.0",
     "map-obj": "^4.1.0"
   }
 }