fix(package): update issue-parser to version 4.0.0

Author: greenkeeper[bot]

package.json

@@ -31,7 +31,7 @@
     "globby": "^9.0.0",
     "http-proxy-agent": "^2.1.0",
     "https-proxy-agent": "^2.2.1",
-    "issue-parser": "^3.0.0",
+    "issue-parser": "^4.0.0",
     "lodash": "^4.17.4",
     "mime": "^2.4.3",
     "p-filter": "^2.0.0",