v2.1.0

📚 PR:

• cosmetics
• feat: allow pausing from onHeaders
• Remove node 14 benchmark results
• fix(core/request): handle header set to null (#453)
• test: support earliest versions in range in CI (#454)
• test: skip ESM test when ESM support not available (#455)
• fix(benchmarks): fix timeout errors (#457)
• Fix for node 12.19 (#458)