Initial APHA specific release

What's Changed

• New function to add branch length to exported json by @ellisrichardj in #1
• Change branch length label to 'snps' by @ellisrichardj in #2
• Refine Color-by options by @ellisrichardj in #3
• Change snp to SNP Distance by @ellisrichardj in #4
• allow space in branch label pattern by @ellisrichardj in #5
• Advance fork to latest version of nextstrain/augur by @ellisrichardj in #6
• Round branch lengths by @ellisrichardj in #8
• Update workflows by @ellisrichardj in #9

New Contributors

• @ellisrichardj made their first contribution in #1

Full Changelog: https://github.com/aphascience/augur/commits/v1.0-APHA