Switch tests from heroku/buildpacks:20
to heroku/builder:20
#693
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Since the
heroku/buildpacks:20
image is about to be deprecated, and has been replaced by the newly addedheroku/builder:20
for those that need to use a Heroku-20 based builder.The build and run images used by
heroku/builder:20
are the same as those used byheroku/buildpacks:20
- the only differences between the builders are the included buildpacks (which is somewhat irrelevant for these integration tests, since the buildpack under test will be injected instead).See:
heroku/cnb-builder-images#394
https://salesforce.quip.com/0JtbAYiWZYk6
GUS-W-14186015.