Bump steep from 1.7.1 to 1.8.0

Bumps [steep](https://github.com/soutaro/steep) from 1.7.1 to 1.8.0.
- [Release notes](https://github.com/soutaro/steep/releases)
- [Changelog](https://github.com/soutaro/steep/blob/master/CHANGELOG.md)
- [Commits](soutaro/steep@v1.7.1...v1.8.0)

---
updated-dependencies:
- dependency-name: steep
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -26,7 +26,7 @@ GEM
     ffi (1.17.0)
     ffi (1.17.0-arm64-darwin)
     fileutils (1.7.2)
-    i18n (1.14.5)
+    i18n (1.14.6)
       concurrent-ruby (~> 1.0)
     json (2.7.2)
     language_server-protocol (3.17.0.3)
@@ -57,7 +57,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rbs (3.5.3)
+    rbs (3.6.1)
       logger
     regexp_parser (2.9.2)
     rouge (4.4.0)
@@ -118,7 +118,7 @@ GEM
       net-ssh (>= 2.7)
       net-telnet
       sfl
-    steep (1.7.1)
+    steep (1.8.0)
       activesupport (>= 5.1)
       concurrent-ruby (>= 1.1.10)
       csv (>= 3.0.9)
@@ -129,7 +129,7 @@ GEM
       logger (>= 1.3.0)
       parser (>= 3.1)
       rainbow (>= 2.2.2, < 4.0)
-      rbs (>= 3.5.0.pre)
+      rbs (~> 3.6.0)
       securerandom (>= 0.1)
       strscan (>= 1.0.0)
       terminal-table (>= 2, < 4)