Lock file maintenance (#33)

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This PR contains the following updates:

| Update | Change |
|---|---|
| lockFileMaintenance | All locks refreshed |

🔧 This Pull Request updates lock files to use the latest dependency
versions.

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Gemfile.lock

@@ -108,11 +108,11 @@ GEM
       net-smtp
     method_source (1.0.0)
     mini_mime (1.1.5)
-    mini_portile2 (2.8.4)
+    mini_portile2 (2.8.5)
     minitest (5.20.0)
     mutex_m (0.1.2)
     nenv (0.3.0)
-    net-imap (0.4.1)
+    net-imap (0.4.2)
       date
       net-protocol
     net-pop (0.1.2)
@@ -239,7 +239,7 @@ GEM
       activesupport (>= 3)
       attr_required (>= 0.0.5)
       httpclient (>= 2.4)
-    thor (1.2.2)
+    thor (1.3.0)
     timeout (0.4.0)
     tomlrb (2.0.3)
     tzinfo (2.0.6)