Patch release with updated dependencies

• Now using a fork of the quic package, since there were build issues with it (could not build with gccgo and issue #41).
• Updated dependencies.
• There are still issues with compiling simplebolt with gccgo, which is why Algernon can not be compiled with gccgo in a way where simplebolt works, yet. This is related to different behavior between go and gccgo and will be worked around in simplebolt. See: golang/go#36430
• The autorefresh feature (-a or --autorefresh) may now follow symlinks to diretories, to make the ./welcome.sh script and example more user-friendly when live editing for instance samples/greetings/index.md.
• The file-search backend of the autofresh feature is now also concurrent.
• Tested with the latest version of Go (1.13.5) on 64-bit Arch Linux.