Bump net-imap from 0.4.13 to 0.4.19 (#18)

Bumps [net-imap](https://github.com/ruby/net-imap) from 0.4.13 to 0.4.19.
- [Release notes](https://github.com/ruby/net-imap/releases)
- [Commits](ruby/net-imap@v0.4.13...v0.4.19)

---
updated-dependencies:
- dependency-name: net-imap
  dependency-type: indirect
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -48,7 +48,7 @@ GEM
     concurrent-ruby (1.3.4)
     connection_pool (2.4.1)
     crass (1.0.6)
-    date (3.3.4)
+    date (3.4.1)
     dnsruby (1.72.1)
       simpleidn (~> 0.2.1)
     drb (2.2.1)
@@ -71,7 +71,7 @@ GEM
     mini_mime (1.1.5)
     minitest (5.25.4)
     mutex_m (0.3.0)
-    net-imap (0.4.13)
+    net-imap (0.4.19)
       date
       net-protocol
     net-pop (0.1.2)
@@ -120,7 +120,7 @@ GEM
     simpleidn (0.2.3)
     stringio (3.1.1)
     thor (1.3.1)
-    timeout (0.4.1)
+    timeout (0.4.3)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unicode-scripts (1.9.0)