Bump guard from 2.18.0 to 2.18.1

Bumps [guard](https://github.com/guard/guard) from 2.18.0 to 2.18.1.
- [Release notes](https://github.com/guard/guard/releases)
- [Commits](guard/guard@v2.18.0...v2.18.1)

---
updated-dependencies:
- dependency-name: guard
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -193,7 +193,7 @@ GEM
       concurrent-ruby (~> 1.1)
       webrick (~> 1.7)
       websocket-driver (>= 0.6, < 0.8)
-    ffi (1.15.5)
+    ffi (1.16.3)
     figaro (1.2.0)
       thor (>= 0.14.0, < 2)
     formatador (1.1.0)
@@ -206,7 +206,7 @@ GEM
     gretel (4.5.0)
       actionview (>= 5.1, < 7.1)
       railties (>= 5.1, < 7.1)
-    guard (2.18.0)
+    guard (2.18.1)
       formatador (>= 0.2.4)
       listen (>= 2.7, < 4.0)
       lumberjack (>= 1.0.12, < 2.0)
@@ -240,13 +240,13 @@ GEM
     letter_opener (1.8.1)
       launchy (>= 2.2, < 3)
     lint_roller (1.1.0)
-    listen (3.8.0)
+    listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     loofah (2.22.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
-    lumberjack (1.2.9)
+    lumberjack (1.2.10)
     mail (2.8.1)
       mini_mime (>= 0.1.1)
       net-imap