Update dependency natural to v7 (#136)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "metalsmith-collections-related",
-  "version": "2.0.6",
+  "version": "2.0.7",
   "description": "A Metalsmith plugin to find related files within collections.",
   "keywords": [
     "metalsmith",
@@ -49,7 +49,7 @@
   "dependencies": {
     "deepmerge": "^4.3.1",
     "html-escaper": "^3.0.3",
-    "natural": "^6.12.0",
+    "natural": "^7.0.5",
     "sanitize-html": "^2.13.0"
   },
   "peerDependencies": {