fix(deps): Update semantic release

Author: maticzav

package.json

@@ -28,7 +28,7 @@
     "prettier": "1.12.1",
     "prettier-check": "2.0.0",
     "rimraf": "2.6.2",
-    "semantic-release": "15.6.6",
+    "semantic-release": "^15.8.1",
     "tslint": "5.10.0",
     "tslint-config-prettier": "1.13.0",
     "tslint-config-standard": "7.0.0",