v0.8.15 AsyncInsert Close Fix

What's Changed

• Update test_tls.py reference by @emmanuel-ferdman in #455
• Gg/update test jwt by @genzgd in #458
• Fix memory leak in AsyncClient by @pufit in #457
• 0.8.15 release by @genzgd in #459
• Exclude 3.8 Aarch64 builds by @genzgd in #460

New Contributors

• @emmanuel-ferdman made their first contribution in #455
• @pufit made their first contribution in #457

Full Changelog: v0.8.14...v0.8.15