chore(deps): update dependency semver to v6

Author: renovate-bot

package-lock.json

@@ -59,7 +59,7 @@
     "@types/mocha": "5.2.7",
     "@types/mz": "0.0.32",
     "@types/node": "8.10.29",
-    "@types/semver": "5.5.0",
+    "@types/semver": "6.2.0",
     "husky": "1.1.3",
     "prettier": "1.15.3",
     "semantic-release": "15.10.8",
@@ -72,7 +72,7 @@
   "dependencies": {
     "execa": "1.0.0",
     "mz": "2.7.0",
-    "semver": "5.6.0",
+    "semver": "6.3.0",
     "vscode-languageclient": "5.1.1"
   },
   "commitlint": {