chore(package): update @types/shelljs to version 0.8.0

Author: greenkeeper[bot]

package.json

@@ -62,7 +62,7 @@
   "devDependencies": {
     "@types/chai": "^4.1.2",
     "@types/node": "^9.4.7",
-    "@types/shelljs": "^0.7.8",
+    "@types/shelljs": "^0.8.0",
     "@types/sinon": "^4.3.0",
     "@types/sinon-chai": "^2.7.29",
     "chai": "^4.1.2",