message: build: Update default platform toolset in msvc-autogen.py
  The platform toolset was updated from v141 to v142 in
diff: @@ -9,7 +9,7 @@ import argparse
  from shutil import copyfile
  SOURCE_DIR = os.path.abspath(os.path.join(os.path.dirname(__file__), '..', 'src'))
  -DEFAULT_PLATFORM_TOOLSET = R'v141'
  +DEFAULT_PLATFORM_TOOLSET = R'v142'
  libs = [
  'libbitcoin_cli',
  