Hugo 0.20.3

This is a bug-fix release with one important fix. But it also adds some harness around GoReleaser to automate the Hugo release process. Big thanks to @caarlos0 for great and super-fast support fixing issues along the way.

Hugo now has:

• 16619+ stars
• 458+ contributors
• 156+ themes

Enhancement  

• Automate the Hugo release process 550eba64 @bep #3358

Fix  

• Fix handling of zero-length files 9bf5c381 @bep #3355