build(deps-dev): update semantic-release requirement (#178)

Updates the requirements on [semantic-release](https://github.com/semantic-release/semantic-release) to permit the latest version.
- [Release notes](https://github.com/semantic-release/semantic-release/releases)
- [Commits](https://github.com/semantic-release/semantic-release/commits/v15.13.1)

Signed-off-by: dependabot[bot] <support@dependabot.com>

package.json

@@ -33,7 +33,7 @@
     "cz-conventional-changelog": "2.1.0",
     "mocha": "5.2.0",
     "nyc": "13.1.0",
-    "semantic-release": "15.12.2",
+    "semantic-release": "15.13.1",
     "standard": "12.0.1",
     "@semantic-release/changelog": "3.0.1",
     "@semantic-release/git": "7.0.5",