build(deps-dev): bump backstopjs from 6.1.1 to 6.1.3

Bumps [backstopjs](https://github.com/garris/backstopjs) from 6.1.1 to 6.1.3.
- [Release notes](https://github.com/garris/backstopjs/releases)
- [Changelog](https://github.com/garris/BackstopJS/blob/master/changelog.md)
- [Commits](https://github.com/garris/backstopjs/commits/v6.1.3)

---
updated-dependencies:
- dependency-name: backstopjs
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -69,7 +69,7 @@
     "@pattern-lab/uikit-workshop": "^5.17.0",
     "@wemake-services/stylelint-config-scss": "^1.0.0",
     "autoprefixer": "^10.4.12",
-    "backstopjs": "^6.1.1",
+    "backstopjs": "^6.1.3",
     "cpr": "^3.0.1",
     "details-element-polyfill": "^2.4.0",
     "dialog-polyfill": "^0.5.6",