Update formtastic to version 4.0.0

Gemfile.lock

@@ -201,8 +201,8 @@ GEM
     font-awesome-rails (4.7.0.7)
       railties (>= 3.2, < 7)
     formatador (0.2.5)
-    formtastic (3.1.5)
-      actionpack (>= 3.2.13)
+    formtastic (4.0.0)
+      actionpack (>= 5.2.0)
     formtastic-bootstrap (3.1.1)
       formtastic (>= 3.0)
     geckodriver-helper (0.24.0)
@@ -292,7 +292,7 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    loofah (2.10.0)
+    loofah (2.11.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     lumberjack (1.0.12)
@@ -311,7 +311,7 @@ GEM
       rake
     mini_magick (4.11.0)
     mini_mime (1.1.0)
-    mini_portile2 (2.5.3)
+    mini_portile2 (2.6.1)
     minitest (5.14.4)
     momentjs-rails (2.20.1)
       railties (>= 3.1)
@@ -331,8 +331,8 @@ GEM
     nenv (0.3.0)
     netrc (0.11.0)
     nio4r (2.5.7)
-    nokogiri (1.11.7)
-      mini_portile2 (~> 2.5.0)
+    nokogiri (1.12.3)
+      mini_portile2 (~> 2.6.1)
       racc (~> 1.4)
     notiffany (0.1.1)
       nenv (~> 0.1)
@@ -670,7 +670,7 @@ DEPENDENCIES
   faker
   feature
   font-awesome-rails
-  formtastic (~> 3.1.5)
+  formtastic (~> 4.0.0)
   formtastic-bootstrap
   geckodriver-helper
   gravtastic