Bump minimist from 1.2.3 to 1.2.6 (#228)

Bumps [minimist](https://github.com/substack/minimist) from 1.2.3 to 1.2.6.
- [Release notes](https://github.com/substack/minimist/releases)
- [Commits](https://github.com/substack/minimist/compare/1.2.3...1.2.6)

---
updated-dependencies:
- dependency-name: minimist
  dependency-type: direct:production
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -15,7 +15,7 @@
     "metalsmith-beautify": "^0.2.0",
     "metalsmith-headings": "^0.2.0",
     "metalsmith-markdown": "^1.2.0",
-    "minimist": "^1.2.3",
+    "minimist": "^1.2.6",
     "swig": "~1.4.2",
     "swig-extras": "~0.0.1"
   },