Update gettext to version 3.4.2

Gemfile.lock

@@ -96,12 +96,14 @@ GEM
       faraday (~> 1.0)
     fast_gettext (2.1.0)
     ffi (1.13.1)
+    forwardable (1.3.2)
     geckodriver-bin (0.28.0)
       archive-zip (~> 0.7)
     get_process_mem (0.2.7)
       ffi (~> 1.0)
-    gettext (3.4.1)
+    gettext (3.4.2)
       locale (>= 2.0.5)
+      prime
       text (>= 1.3.0)
     gettext_i18n_rails (1.8.1)
       fast_gettext (>= 0.9.0)
@@ -140,6 +142,9 @@ GEM
     parser (3.0.2.0)
       ast (~> 2.4.1)
     pkg-config (1.3.2)
+    prime (0.1.2)
+      forwardable
+      singleton
     prometheus_exporter (0.7.0)
       webrick
     public_suffix (4.0.6)
@@ -214,6 +219,7 @@ GEM
     selenium-webdriver (3.142.7)
       childprocess (>= 0.5, < 4.0)
       rubyzip (>= 1.2.2)
+    singleton (0.1.1)
     solargraph (0.44.0)
       backport (~> 1.2)
       benchmark