chore(package): update dependencies

Author: greenkeeper[bot]

package.json

@@ -22,10 +22,10 @@
   },
   "homepage": "https://github.com/yayoc/optional-chain#readme",
   "devDependencies": {
-    "@types/jest": "^22.2.3",
-    "jest": "^22.4.3",
-    "ts-jest": "^22.4.2",
-    "typescript": "^2.9.2"
+    "@types/jest": "^23.3.2",
+    "jest": "^23.6.0",
+    "ts-jest": "^23.1.4",
+    "typescript": "^3.0.3"
   },
   "jest": {
     "transform": {