v0.12.6

Changelog

5c73343 Detect k8s environment using the prefix of the cluster name, instead of an exact match (#3029)
4a4b6d6 cli: docstring for tiltfile-result (#3027)
d26425f cli: update for v0.12.5 (#3025)
54da6f1 engine: if we fail to inject the synclet into a resource, try to recover gracefully (#3050)
2a8cad6 engine: print trigger reasons (#3041)
136f162 engine: replace ForcedUpdate with IsImageBuildTrigger (#3043)
044d9c5 integration: run integration tests on kind against local registry (#2923)
1b0d5c3 k8s: move all minikube calls out of wire injection. Fixes #3021 (#3032)
f2fa8df k8s: report runtime differently on read failure (#3044)
6e0eb64 k8swatch: fix a race condition in pod change events (#3026)
0e8d63e rty: rendering errors shouldn't totally break Tilt. Fixes #3039 (#3040)
552e4ad tiltfile: make read_file error on missing file if default unspecified (#2997)