Update ncurses from 6.1 to 6.2 (#3828)

This is a 6.1-compatible release and everything seems to work properly
whether using existing binaries for packages that depend on this or when
building new ones from source.

Tested on ARM.

packages/ncurses.rb

@@ -3,21 +3,13 @@ require 'package'
 class Ncurses < Package
   description 'The ncurses (new curses) library is a free software emulation of curses in System V Release 4.0 (SVr4), and more.'
   homepage 'https://www.gnu.org/software/ncurses/'
-  version '6.1-0'
-  source_url 'https://ftpmirror.gnu.org/ncurses/ncurses-6.1.tar.gz'
-  source_sha256 'aa057eeeb4a14d470101eff4597d5833dcef5965331be3528c08d99cebaa0d17'
+  version '6.2'
+  source_url 'https://ftpmirror.gnu.org/ncurses/ncurses-6.2.tar.gz'
+  source_sha256 '30306e0c76e0f9f1f0de987cf1c82a5c21e1ce6568b9227f7da5b71cbea86c9d'
 
   binary_url ({
-    aarch64: 'https://dl.bintray.com/chromebrew/chromebrew/ncurses-6.1-0-chromeos-armv7l.tar.xz',
-     armv7l: 'https://dl.bintray.com/chromebrew/chromebrew/ncurses-6.1-0-chromeos-armv7l.tar.xz',
-       i686: 'https://dl.bintray.com/chromebrew/chromebrew/ncurses-6.1-0-chromeos-i686.tar.xz',
-     x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/ncurses-6.1-0-chromeos-x86_64.tar.xz',
   })
   binary_sha256 ({
-    aarch64: 'a12e70f779b2375912a5373b5f320c7b4bef8ddcba5144709e2aed67f8011afe',
-     armv7l: 'a12e70f779b2375912a5373b5f320c7b4bef8ddcba5144709e2aed67f8011afe',
-       i686: 'a89d5d79d91c8717cfecf7ebbebae6479f8cded2884798643d061605e449c1df',
-     x86_64: 'fcaf728604029920a14f27f64f498dfc8a3586bc0426ca6a890adf925e39e204',
   })
 
   def self.build