1.2.0

Changes

• Added private key file formats to ssh.key and ssh.key.Key.export_privkey_file_format for exporting private key
  file with specified format - #96
• Added ssh.channel.Channel.get_exit_status implementation and tests.
• Added key exchange types under ssh.session.
• Added ssh.session.Session.options_set_int_val for setting an integer value libssh option - for example
  compression level.

Packaging

• OSX wheel builds now use embedded libssh rather than brew package.
• Dropped Windows Python 3.7 builds.
• Added Python 3.14 manylinux wheels.