dependabot(npm): bump nouislider from 15.7.0 to 15.7.1

Bumps [nouislider](https://github.com/leongersen/noUiSlider) from 15.7.0 to 15.7.1.
- [Release notes](https://github.com/leongersen/noUiSlider/releases)
- [Changelog](https://github.com/leongersen/noUiSlider/blob/master/CHANGELOG.MD)
- [Commits](leongersen/noUiSlider@15.7.0...15.7.1)

---
updated-dependencies:
- dependency-name: nouislider
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

package.json

@@ -37,7 +37,7 @@
     "ng2-nouislider": "1.8.3",
     "ngx-filesize": "^3.0.2",
     "ngx-clipboard": "^16.0.0",
-    "nouislider": "15.7.0",
+    "nouislider": "15.7.1",
     "popper.js": "1.16.1",
     "rxjs": "6.6.3",
     "rxjs-compat": "6.6.7",