wikiserve: update the rest of the bundle

May as well, and I want to test deploying with the
latest version of Bundler now installed on the server.

wikiserve/Gemfile.lock

@@ -1,32 +1,31 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    backports (3.6.7)
+    backports (3.6.8)
     json (2.0.3)
-    kgio (2.10.0)
-    multi_json (1.11.2)
-    rack (1.6.4)
+    kgio (2.11.0)
+    multi_json (1.12.1)
+    rack (1.6.5)
     rack-protection (1.5.3)
       rack
     rack-test (0.6.3)
       rack (>= 1.0)
-    raindrops (0.15.0)
-    redis (3.2.2)
-    sinatra (1.4.6)
-      rack (~> 1.4)
+    raindrops (0.17.0)
+    redis (3.3.3)
+    sinatra (1.4.8)
+      rack (~> 1.5)
       rack-protection (~> 1.4)
       tilt (>= 1.3, < 3)
-    sinatra-contrib (1.4.6)
+    sinatra-contrib (1.4.7)
       backports (>= 2.0)
       multi_json
       rack-protection
       rack-test
       sinatra (~> 1.4.0)
       tilt (>= 1.3, < 3)
-    tilt (2.0.1)
-    unicorn (5.0.1)
+    tilt (2.0.6)
+    unicorn (5.2.0)
       kgio (~> 2.6)
-      rack
       raindrops (~> 0.7)
     wikitext (4.4)