Bump letter_opener from 1.9.0 to 1.10.0

Bumps [letter_opener](https://github.com/ryanb/letter_opener) from 1.9.0 to 1.10.0.
- [Changelog](https://github.com/ryanb/letter_opener/blob/master/CHANGELOG.md)
- [Commits](ryanb/letter_opener@v1.9.0...v1.10.0)

---
updated-dependencies:
- dependency-name: letter_opener
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -110,6 +110,7 @@ GEM
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
     chartkick (5.0.6)
+    childprocess (5.0.0)
     choice (0.2.0)
     chronic (0.10.2)
     chunky_png (1.4.0)
@@ -168,10 +169,11 @@ GEM
     jwt (2.8.1)
       base64
     language_server-protocol (3.17.0.3)
-    launchy (2.5.2)
+    launchy (3.0.0)
       addressable (~> 2.8)
-    letter_opener (1.9.0)
-      launchy (>= 2.2, < 3)
+      childprocess (~> 5.0)
+    letter_opener (1.10.0)
+      launchy (>= 2.2, < 4)
     listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
@@ -252,7 +254,7 @@ GEM
       websocket-driver (>= 0.2.0)
     psych (5.1.2)
       stringio
-    public_suffix (5.0.4)
+    public_suffix (5.0.5)
     puma (6.4.2)
       nio4r (~> 2.0)
     racc (1.7.3)