adding typescript overlay

package-lock.json

@@ -3291,6 +3291,26 @@
       "integrity": "sha1-+8cfDEGt6zf5bFd60e1C2P2sypE=",
       "dev": true
     },
+    "fork-ts-checker-async-overlay-webpack-plugin": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/fork-ts-checker-async-overlay-webpack-plugin/-/fork-ts-checker-async-overlay-webpack-plugin-0.1.0.tgz",
+      "integrity": "sha512-6R2JjBzL3Bo06mMugTZfDeVBzCGHtZnci7aM+kHD/6YIgb/pG8b/ptAXtp06ySA1ZtwOGVBeHo3BO6slueD7zw==",
+      "dev": true
+    },
+    "fork-ts-checker-webpack-plugin": {
+      "version": "0.5.2",
+      "resolved": "https://registry.npmjs.org/fork-ts-checker-webpack-plugin/-/fork-ts-checker-webpack-plugin-0.5.2.tgz",
+      "integrity": "sha512-a5IG+xXyKnpruI0CP/anyRLAoxWtp3lzdG6flxicANnoSzz64b12dJ7ASAVRrI2OaWwZR2JyBaMHFQqInhWhIw==",
+      "dev": true,
+      "requires": {
+        "babel-code-frame": "^6.22.0",
+        "chalk": "^2.4.1",
+        "chokidar": "^2.0.4",
+        "micromatch": "^3.1.10",
+        "minimatch": "^3.0.4",
+        "tapable": "^1.0.0"
+      }
+    },
     "form-data": {
       "version": "2.3.3",
       "resolved": "https://registry.npmjs.org/form-data/-/form-data-2.3.3.tgz",
@@ -9538,9 +9558,9 @@
       "dev": true
     },
     "typescript": {
-      "version": "3.2.4",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.2.4.tgz",
-      "integrity": "sha512-0RNDbSdEokBeEAkgNbxJ+BLwSManFy9TeXz8uW+48j/xhEXv1ePME60olyzw2XzUqUBNAYFeJadIqAgNqIACwg==",
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.3.3.tgz",
+      "integrity": "sha512-Y21Xqe54TBVp+VDSNbuDYdGw0BpoR/Q6wo/+35M8PAU0vipahnyduJWirxxdxjsAkS7hue53x2zp8gz7F05u0A==",
       "dev": true
     },
     "uglify-js": {