Upgrade test semver dependencies

Author: shepmaster

tests/Gemfile.lock

@@ -18,9 +18,9 @@ GEM
     diff-lcs (1.4.4)
     launchy (2.5.0)
       addressable (~> 2.7)
-    mini_mime (1.0.3)
-    mini_portile2 (2.5.0)
-    nokogiri (1.11.2)
+    mini_mime (1.1.0)
+    mini_portile2 (2.5.1)
+    nokogiri (1.11.3)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
     public_suffix (4.0.6)