Bump libiconv to v1.17

Author: andyundso

CHANGELOG.md

@@ -4,7 +4,7 @@
 * Drop support for SQL Server < 2017
 * Drop support for FreeTDS < 1.0
 * Raise error if FreeTDS is unable to sent command buffer to the server
-* Use freetds v1.4.23 for Windows builds
+* Use freetds v1.4.23 and libiconv v1.17 for Windows builds
 
 ## 2.1.7
 * Add Ruby 3.3 to the cross compile list

ext/tiny_tds/extconsts.rb

@@ -1,5 +1,5 @@
 
-ICONV_VERSION = ENV['TINYTDS_ICONV_VERSION'] || "1.15"
+ICONV_VERSION = ENV['TINYTDS_ICONV_VERSION'] || "1.17"
 ICONV_SOURCE_URI = "http://ftp.gnu.org/pub/gnu/libiconv/libiconv-#{ICONV_VERSION}.tar.gz"
 
 OPENSSL_VERSION = ENV['TINYTDS_OPENSSL_VERSION'] || '1.1.1s'