v1.3.0

• PR #734 - @stefanprodan - Release v1.3.0
• PR #733 - @stefanprodan - Update Istio to v1.8.0
• PR #731 - @mattchrist - Update faq with correct prometheus queries for Contour & Gloo (fixes #730)
• PR #729 - @jddcarreira - Support AWS App Mesh backends ARN
• PR #726 - @robq99 - feat: custom weights in progression
• PR #725 - @sfrique - Add QPS and Burst configs for kubernetes client
• PR #721 - @kingdonb - Fixup some typos
• PR #718 - @seankhliao - fix release date