Nov 16, 2021: Release 1.3.0
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 o Add API to request screen rotation
 o Automatically pick gthread coroutine if ucontext is not available
 o Fix meson logic bug when disabling vala
 o Honour choice of python when generating keymaps
 o Fix error reporting and memory leaks encrypting auth data
 o Fix missing includes for GDK quartz and broadway backends
 o Switch to GNUTLS for VNC auth challenge to fix empty password handling
 o Fix handling of auth subtypes in gvnccapture program