Bump net-imap from 0.4.11 to 0.4.19 (#175)

Bumps [net-imap](https://github.com/ruby/net-imap) from 0.4.11 to 0.4.19.
- [Release notes](https://github.com/ruby/net-imap/releases)
- [Commits](ruby/net-imap@v0.4.11...v0.4.19)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -90,7 +90,7 @@ GEM
     concurrent-ruby (1.3.5)
     connection_pool (2.5.0)
     crass (1.0.6)
-    date (3.3.4)
+    date (3.4.1)
     drb (2.2.1)
     erubi (1.13.1)
     execjs (2.10.0)
@@ -127,7 +127,7 @@ GEM
     minitest (5.25.4)
     msgpack (1.8.0)
     mutex_m (0.3.0)
-    net-imap (0.4.11)
+    net-imap (0.4.19)
       date
       net-protocol
     net-pop (0.1.2)
@@ -216,7 +216,7 @@ GEM
     stringio (3.1.0)
     thor (1.3.1)
     tilt (2.1.0)
-    timeout (0.4.1)
+    timeout (0.4.3)
     turbolinks (5.2.1)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)