v10.0.0

[connorjclark]

I removed all the references to changes in our 9.6.x cherry pick releases (which our changelog generator didn't know how to exclude). The useful commands I used to do that were:

function regex { gawk 'match($0,/'$1'/, ary) {print ary['${2:-'0'}']}'; }
cat changelog.md | regex 'pull\/([^)]*)\)' 1 | sort | uniq -d

preview: https://gist.github.com/connorjclark/55d360356d7a75da802e13f611904f6b