Replace gzip with zstd
v1.12.0 replaces standard gzip compression with zstd, and specifies a fast compression setting. This yields a large improvement in performance while generally only sacrificing a few percentage points of compression ratio.
Note that older builds of honeycomb_secure_proxy don't support zstd content encoding, so Secure Tenancy customers will either need to update to a recent build or disable compression before deploying this release of libhoney-go.