Merge pull request #1312 from gliderlabs/dependabot/bundler/buildpack… #1392

Job	Run time
build.20-true	1m 24s
build.22-true	1m 25s
build.24-true	1m 22s
build.20-false	1m 29s
build.22-false	1m 26s
build.24-false	1m 26s
unit.heroku-${{ matrix.heroku }}.${{ matrix.buildpack }}	1s
	8m 33s

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