Merge pull request #28 from slack-ruby/dependabot/bundler/nokogiri-1.12.5

Bump nokogiri from 1.10.10 to 1.12.5

Author: dblock

Gemfile.lock

@@ -126,7 +126,7 @@ GEM
       mime-types-data (~> 3.2015)
     mime-types-data (3.2020.1104)
     mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.6.1)
     minitest (5.14.2)
     mongo (2.13.1)
       bson (>= 4.8.2, < 5.0.0)
@@ -157,13 +157,15 @@ GEM
       slack-ruby-bot (>= 0.10.5)
     newrelic_rpm (6.14.0)
     nio4r (2.5.4)
-    nokogiri (1.10.10)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.12.5)
+      mini_portile2 (~> 2.6.1)
+      racc (~> 1.4)
     oj (3.10.16)
     parallel (1.20.1)
     parser (2.7.2.0)
       ast (~> 2.4.1)
     public_suffix (4.0.6)
+    racc (1.5.2)
     rack (2.2.3)
     rack-accept (0.4.5)
       rack (>= 0.4)