v0.7.0

Changelog

• 477af58 - Merge branch 'feature/makefile_optimize' into develop
• 1bc2d9f - feat: optimize *.sh according to shellcheck
• 49b717d - feat: optimize 'make test' cmd
• c1029c4 - feat: add Dockerfile and add 'make docker' cmd
• 69932e0 - chore: format adjustment on regression_test.sh

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NOTE: harbor-go-client v0.7.0 and before is compatible with harbor v1.2.2 and before. see #2