chore(deps-dev): update semver requirement from ^5.5.1 to ^6.3.0

Updates the requirements on [semver](https://github.com/npm/node-semver) to permit the latest version.
- [Release notes](https://github.com/npm/node-semver/releases)
- [Changelog](https://github.com/npm/node-semver/blob/master/CHANGELOG.md)
- [Commits](npm/node-semver@v5.5.1...v6.3.0)

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

package.json

@@ -62,7 +62,7 @@
     "nyc": "^13.3.0",
     "pg": "^7.8.2",
     "pkg-ok": "^2.3.1",
-    "semver": "^5.5.1",
+    "semver": "^6.3.0",
     "sqlite3": "^4.0.6",
     "standard": "^12.0.1"
   },