Also include bin in directories to load native code

Author: andyundso

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 3.2.1
+
+* Ensure the native Gem loads on Windows. Fixes #581.
+
 ## 3.2.0
 
 * Reduce number of files shipped with precompiled Windows gem

VERSION

@@ -1 +1 @@
-3.2.0
+3.2.1

lib/tiny_tds.rb

@@ -11,7 +11,7 @@ module TinyTds
   # Is this file part of a fat binary gem with bundled freetds?
   # This path must be enabled by add_dll_directory on Windows.
   gplat = ::Gem::Platform.local
-  FREETDS_LIB_PATH = Dir[File.expand_path("../ports/#{gplat.cpu}-#{gplat.os}*/lib", __dir__)].first
+  FREETDS_LIB_PATH = Dir[File.expand_path("../ports/#{gplat.cpu}-#{gplat.os}*/{bin,lib}", __dir__)].first
 
   add_dll_path = proc do |path, &block|
     if RUBY_PLATFORM =~ /(mswin|mingw)/i && path