Updated dev dependencies.

package.json

@@ -71,20 +71,20 @@
   },
   "homepage": "https://threejs.org/",
   "devDependencies": {
-    "@typescript-eslint/eslint-plugin": "^2.3.3",
-    "@typescript-eslint/parser": "^2.3.3",
     "@types/webgl2": "^0.0.5",
+    "@typescript-eslint/eslint-plugin": "^2.4.0",
+    "@typescript-eslint/parser": "^2.4.0",
     "concurrently": "^5.0.0",
-    "eslint": "^6.2.1",
+    "eslint": "^6.5.1",
     "eslint-config-mdcs": "^4.2.3",
     "eslint-plugin-html": "^6.0.0",
     "failonlyreporter": "^1.0.0",
     "google-closure-compiler": "20190929.0.0",
     "http-server": "^0.11.1",
-    "qunit": "^2.9.2",
-    "rollup": "^1.23.1",
-    "typescript": "^3.6.3",
-    "rollup-plugin-buble": "^0.19.8"
+    "qunit": "^2.9.3",
+    "rollup": "^1.25.1",
+    "rollup-plugin-buble": "^0.19.8",
+    "typescript": "^3.6.4"
   },
   "jspm": {
     "files": [