Update re2 gem to v1.2.0

The latest re2 library released on Homebrew does not compile with this
gem: https://github.com/mudge/re2/issues/40. Update this gem to make
that work.

Gemfile

@@ -204,7 +204,7 @@ gem 'ruby-progressbar'
 gem 'settingslogic', '~> 2.0.9'
 
 # Linear-time regex library for untrusted regular expressions
-gem 're2', '~> 1.1.1'
+gem 're2', '~> 1.2.0'
 
 # Misc
 

Gemfile.lock

@@ -854,7 +854,7 @@ GEM
       msgpack (>= 0.4.3)
       optimist (>= 3.0.0)
     rdoc (6.1.2)
-    re2 (1.1.1)
+    re2 (1.2.0)
     recaptcha (4.13.1)
       json
     recursive-open-struct (1.1.0)
@@ -1346,7 +1346,7 @@ DEPENDENCIES
   rblineprof (~> 0.3.6)
   rbtrace (~> 0.4)
   rdoc (~> 6.1.2)
-  re2 (~> 1.1.1)
+  re2 (~> 1.2.0)
   recaptcha (~> 4.11)
   redis (~> 4.0)
   redis-namespace (~> 1.6.0)