Bump strscan from 3.1.2 to 3.1.3 in /steep

Bumps [strscan](https://github.com/ruby/strscan) from 3.1.2 to 3.1.3.
- [Release notes](https://github.com/ruby/strscan/releases)
- [Changelog](https://github.com/ruby/strscan/blob/master/NEWS.md)
- [Commits](ruby/strscan@v3.1.2...v3.1.3)

---
updated-dependencies:
- dependency-name: strscan
  dependency-version: 3.1.3
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

steep/Gemfile.lock

@@ -70,7 +70,7 @@ GEM
       strscan (>= 1.0.0)
       terminal-table (>= 2, < 5)
       uri (>= 0.12.0)
-    strscan (3.1.2)
+    strscan (3.1.3)
     terminal-table (4.0.0)
       unicode-display_width (>= 1.1.1, < 4)
     test-unit (3.6.8)