fix: update package import paths

cmd/semantic-release/main.go

go.mod

pkg/analyzer/commit_analyzer.go

pkg/analyzer/commit_analyzer.pb.go

pkg/analyzer/commit_analyzer.proto

pkg/analyzer/commit_analyzer_wrapper.go

pkg/analyzer/plugin/commit_analyzer_default.go

pkg/analyzer/plugin/commit_analyzer_default_test.go

pkg/analyzer/plugin/plugin.go

pkg/condition/ci_condition.pb.go

pkg/condition/ci_condition.proto

pkg/condition/defaultci/default.go

pkg/condition/github/github.go

pkg/condition/gitlab/gitlab.go

pkg/condition/travis/travis.go

pkg/generator/changelog_generator.pb.go

pkg/generator/changelog_generator.proto

pkg/generator/plugin/changelog_generator_default.go

pkg/generator/plugin/changelog_generator_default_test.go

pkg/generator/plugin/plugin.go