update Flow version

assets/javascripts/templates/pages/about_tmpl.coffee

@@ -553,8 +553,8 @@ credits = [
   ], [
     'React, React Native, Flow, Relay',
     '2013-present Facebook Inc.',
-    'CC BY',
-    'https://raw.githubusercontent.com/reactjs/reactjs.org/master/LICENSE-DOCS.md'
+    'MIT',
+    'https://raw.githubusercontent.com/facebook/react/master/LICENSE'
   ], [
     'Redis',
     '2009-2018 Salvatore Sanfilippo',

lib/docs/scrapers/flow.rb

@@ -1,7 +1,7 @@
 module Docs
   class Flow < UrlScraper
     self.type = 'flow'
-    self.release = '0.68.0'
+    self.release = '0.75.0'
     self.base_url = 'https://flow.org/en/docs/'
     self.links = {
       home: 'https://flow.org/',
@@ -16,7 +16,7 @@ module Docs
 
     options[:attribution] = <<-HTML
       &copy; 2013&ndash;present Facebook Inc.<br>
-      Licensed under the BSD License.
+      Licensed under the MIT License.
     HTML
   end
 end