Bump net-imap from 0.3.2 to 0.3.4

Bumps [net-imap](https://github.com/ruby/net-imap) from 0.3.2 to 0.3.4.
- [Release notes](https://github.com/ruby/net-imap/releases)
- [Commits](https://github.com/ruby/net-imap/compare/v0.3.2...v0.3.4)

---
updated-dependencies:
- dependency-name: net-imap
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -114,7 +114,7 @@ GEM
       activerecord (>= 5.a)
       database_cleaner-core (~> 2.0.0)
     database_cleaner-core (2.0.1)
-    date (3.3.1)
+    date (3.3.3)
     debug_inspector (1.1.0)
     devise (4.8.1)
       bcrypt (~> 3.0)
@@ -268,7 +268,7 @@ GEM
     multipart-post (2.1.1)
     naught (1.1.0)
     nested_form (0.3.2)
-    net-imap (0.3.2)
+    net-imap (0.3.4)
       date
       net-protocol
     net-pop (0.1.2)