Bump gettext to v3.3.6 for Ruby 2.7

This solves https://github.com/ruby-gettext/gettext/issues/64.

Changes:
https://github.com/ruby-gettext/gettext/blob/master/doc/text/news.md

Full diff:
https://github.com/ruby-gettext/gettext/compare/3.2.9..3.3.6

Gemfile

@@ -316,7 +316,7 @@ gem 'ruby_parser', '~> 3.8', require: false
 gem 'rails-i18n', '~> 6.0'
 gem 'gettext_i18n_rails', '~> 1.8.0'
 gem 'gettext_i18n_rails_js', '~> 1.3'
-gem 'gettext', '~> 3.2.2', require: false, group: :development
+gem 'gettext', '~> 3.3', require: false, group: :development
 
 gem 'batch-loader', '~> 1.4.0'
 

Gemfile.lock

@@ -403,7 +403,7 @@ GEM
       json
     get_process_mem (0.2.5)
       ffi (~> 1.0)
-    gettext (3.2.9)
+    gettext (3.3.6)
       locale (>= 2.0.5)
       text (>= 1.3.0)
     gettext_i18n_rails (1.8.0)
@@ -653,7 +653,7 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    locale (2.1.2)
+    locale (2.1.3)
     lockbox (0.3.3)
     lograge (0.11.2)
       actionpack (>= 4)
@@ -1297,7 +1297,7 @@ DEPENDENCIES
   fugit (~> 1.2.1)
   fuubar (~> 2.2.0)
   gemojione (~> 3.3)
-  gettext (~> 3.2.2)
+  gettext (~> 3.3)
   gettext_i18n_rails (~> 1.8.0)
   gettext_i18n_rails_js (~> 1.3)
   gitaly (~> 13.3.0.pre.rc1)