v0.21.0

Added

• Handle --no-config-file (--no-config) option to prevent looking up for a configuration file (#274)
• --config option aliased to --config-file (#274)
• Look up a configuration file with cjs extension (#276)
• Add port number instructions in readme for server option (#275 by @nuric)

Changed

• Upgrade Marp Core to v1.3.0 (#271)
• Improve PDF accessibility by enabling --export-tagged-pdf Chromium option (#269)
• Mark standalone binary as stable (#273)
• Upgrade dependent packages to the latest version (#276)