Update typescript-eslint monorepo to v2.6.1

Author: renovate-bot

package-lock.json

@@ -36,8 +36,8 @@
   "devDependencies": {
     "@babel/core": "7.6.4",
     "@svgr/webpack": "4.3.3",
-    "@typescript-eslint/eslint-plugin": "2.4.0",
-    "@typescript-eslint/parser": "2.4.0",
+    "@typescript-eslint/eslint-plugin": "2.6.1",
+    "@typescript-eslint/parser": "2.6.1",
     "babel-eslint": "10.0.3",
     "babel-jest": "24.9.0",
     "babel-loader": "8.0.6",