Update Ruby dependencies

Gemfile.lock

@@ -71,7 +71,7 @@ GEM
     airbrussh (1.5.0)
       sshkit (>= 1.6.1, != 1.7.0)
     ast (2.4.2)
-    base64 (0.1.1)
+    base64 (0.2.0)
     bindex (0.8.1)
     bootsnap (1.17.0)
       msgpack (~> 1.2)
@@ -118,7 +118,7 @@ GEM
       rexml
     crass (1.0.6)
     dalli (3.2.6)
-    date (3.3.3)
+    date (3.3.4)
     debug (1.8.0)
       irb (>= 1.5.0)
       reline (>= 0.3.1)
@@ -193,7 +193,7 @@ GEM
     iiif-image-api (0.2.0)
       activesupport
     io-console (0.6.0)
-    irb (1.8.3)
+    irb (1.9.0)
       rdoc
       reline (>= 0.3.8)
     jbuilder (2.11.5)
@@ -227,7 +227,7 @@ GEM
       net-protocol
     net-pop (0.1.2)
       net-protocol
-    net-protocol (0.2.1)
+    net-protocol (0.2.2)
       timeout
     net-scp (4.0.0)
       net-ssh (>= 2.6.5, < 8.0.0)
@@ -304,7 +304,7 @@ GEM
     redis-client (0.18.0)
       connection_pool
     regexp_parser (2.8.2)
-    reline (0.3.9)
+    reline (0.4.0)
       io-console (~> 0.5)
     retries (0.0.5)
     rexml (3.2.6)
@@ -371,14 +371,14 @@ GEM
     sshkit (1.21.5)
       net-scp (>= 1.1.2)
       net-ssh (>= 2.8.0)
-    stringio (3.0.8)
+    stringio (3.0.9)
     thor (1.3.0)
-    timeout (0.4.0)
+    timeout (0.4.1)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unf (0.1.4)
       unf_ext
-    unf_ext (0.0.8.2)
+    unf_ext (0.0.9)
     unicode-display_width (2.5.0)
     web-console (4.2.1)
       actionview (>= 6.0.0)