Fix color issues in ncurses programs

Certain programs like `htop` have problems with the number
of color pairs which are specified by the Alacritty terminfo
file. 

By reducing the maximum number of color pairs to the value
which is specified by xterm-256color, these issues are
resolved.

This fixes #1862.

CHANGELOG.md

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+
+- Fix color issue in ncurses programs by updating terminfo pairs from 0x10000 to 0x7FFF
+
 ## Version 0.2.4
 
 ### Added

alacritty.info

@@ -2,7 +2,7 @@ alacritty|alacritty terminal emulator,
     use=alacritty+common,
     rs1=\Ec\E]104\007,
     ccc,
-    colors#0x100, pairs#0x10000,
+    colors#0x100, pairs#0x7FFF,
     initc=\E]4;%p1%d;rgb\:%p2%{255}%*%{1000}%/%2.2X/%p3%{255}%*
           %{1000}%/%2.2X/%p4%{255}%*%{1000}%/%2.2X\E\\,
     oc=\E]104\007,
@@ -15,7 +15,7 @@ alacritty|alacritty terminal emulator,
 alacritty-direct|alacritty with direct color indexing,
     use=alacritty+common,
     RGB,
-    colors#0x1000000, pairs#0x10000,
+    colors#0x1000000, pairs#0x7FFF,
     initc@, op=\E[39;49m,
     setab=\E[%?%p1%{8}%<%t4%p1%d%e48;2;%p1%{65536}%/%d;%p1%{256}
           %/%{255}%&%d;%p1%{255}%&%d%;m,