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] <[email protected]>

Gemfile.lock

@@ -196,7 +196,7 @@ GEM
       rexml
     crass (1.0.6)
     daemons (1.4.1)
-    date (3.3.4)
+    date (3.4.1)
     debugger-ruby_core_source (1.3.8)
     declarative (0.0.20)
     deep_cloneable (3.2.0)
@@ -436,7 +436,7 @@ GEM
     net-http-digest_auth (1.4.1)
     net-http-persistent (4.0.1)
       connection_pool (~> 2.2)
-    net-imap (0.4.10)
+    net-imap (0.4.19)
       date
       net-protocol
     net-pop (0.1.2)
@@ -831,7 +831,7 @@ GEM
       rack (>= 1, < 3)
     thor (1.3.1)
     thread_safe (0.3.6)
-    timeout (0.4.1)
+    timeout (0.4.3)
     tins (1.31.0)
       sync
     to_regexp (0.2.1)