Bump docker/build-push-action from v1 to v2

[dependabot[bot]]

Bumps docker/build-push-action from v1 to v2.

Changelog

Sourced from docker/build-push-action's changelog.

2.0.0 (2020/??/??)

v2 of Build Push action uses Docker Buildx. It's also rewritten as a typescript-action to be as closed as possible of the GitHub Runner during its execution (#71 #92).

• Rename path input to context
• Rename dockerfile input to file
• Rename always_pull input to pull
• Add builder input to be able to choose a builder instance through our setup-buildx action
• Add platforms input
• Add allow input
• Add load input
• Add outputs input
• Add cache-from input
• Add cache-to input
• Add secrets input
• Review tags input
• Remove repository, username, password, registry, cache_froms inputs
• Remove tag_with_sha, tag_with_ref, add_git_labels inputs
• Handle Git context
• Add digest output
• Login support moved to docker/login-action repo
• Enhanced examples in README
• Tests and/or CI workflows

1.1.0 (2020/04/23)

• Add cache-from support fixing #7
• Add GCR example

1.0.1 (2020/03/23)

• Clarify dockerfile and path inputs
• Rename LICENCE to LICENSE
• Use v1 of docker/gihub-actions image
• Logs in before building image

Commits

• 85d4087 Merge pull request #102 from crazy-max/v2-fix-input-list
• 90d197d Exclude empty items from input list
• e01a38b Merge pull request #92 from docker/v2-build-push
• ff910a3 Update CI workflow (docker/setup-buildx-action#14)
• cf9301c Use --builder
• b563df0 Update README
• f295fbf Add secrets input
• bd6a018 Add isolated builders example
• 8954ded Ignore comma sep for CSV inputs type
• c124ff0 Add GitHub cache example
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #15.