upgraded build tools

package.json

@@ -4,7 +4,8 @@
   "description": "",
   "main": "./public/js/tessellate.js",
   "scripts": {
-    "build": "webpack --mode production",
+    "build:dev": "webpack --mode development",
+    "build:prod": "webpack --mode production",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "repository": {
@@ -18,10 +19,10 @@
   },
   "homepage": "https://gitea.daggertrout.com/mcdoh/Tessellate#README",
   "devDependencies": {
-    "babel-core": "^6.26.3",
-    "babel-loader": "^7.1.4",
-    "babel-preset-env": "^1.7.0",
-    "webpack": "^4.12.0",
-    "webpack-cli": "^3.0.8"
+    "@babel/core": "^7.2.2",
+    "@babel/preset-env": "^7.3.1",
+    "babel-loader": "^8.0.5",
+    "webpack": "^4.29.0",
+    "webpack-cli": "^3.2.1"
   }
 }