Bumped v6.6.0

Merge branch 'master' of github.com:mcollina/autocannon

Enable WASM for HdrHistogramJS (mcollina#283)

Bumped v6.3.0

Bumped v6.2.0

Bumped v6.1.0

Bumped v6.0.0

Bumped v5.1.0

Bumped v5.0.1

Bumped v5.0.0