Bump net-imap from 0.4.10 to 0.4.19

Bumps [net-imap](https://github.com/ruby/net-imap) from 0.4.10 to 0.4.19.
- [Release notes](https://github.com/ruby/net-imap/releases)
- [Commits](ruby/net-imap@v0.4.10...v0.4.19)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -90,7 +90,7 @@ GEM
     concurrent-ruby (1.3.4)
     connection_pool (2.4.1)
     crass (1.0.6)
-    date (3.3.4)
+    date (3.4.1)
     diff-lcs (1.5.1)
     dotenv (2.8.1)
     drb (2.2.1)
@@ -134,7 +134,7 @@ GEM
     minitest (5.25.1)
     msgpack (1.7.2)
     mutex_m (0.2.0)
-    net-imap (0.4.10)
+    net-imap (0.4.19)
       date
       net-protocol
     net-pop (0.1.2)
@@ -279,7 +279,7 @@ GEM
       spring (>= 4)
     stringio (3.1.2)
     thor (1.3.2)
-    timeout (0.4.1)
+    timeout (0.4.3)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unicode-display_width (3.1.2)