Require wxWidgets 3.2

wxWigets 3.0 does stuff that is deprecated in C++20, namely bitwise
operation between different enumeration types. wxWidgets 3.2 has
widespread support and in fact 3.3 was release recently so 3.4 won't be
that far off anymore either. Requiring 3.2 will allow us to do several
cleanups.

Signed-off-by: Ralph Sennhauser <ralph.sennhauser@gmail.com>

build/jenkins/pipelines/freeBSD.Jenkinsfile

@@ -35,7 +35,7 @@ pipeline {
 
     environment {
         USE = 'iconv'
-        WX_CONFIG = '/usr/local/bin/wxgtk3u-3.0-config'
+        WX_CONFIG = '/usr/local/bin/wxgtk3u-3.2-config'
         CXXFLAGS = '-stdlib=libc++ '
         LLVM_OBJDUMP = '/usr/bin/llvm-objdump'
     }