Add collection add/remove endpoints for the new Metron schema - #2

refs/pull/2/merge points to an ephemeral pull request merge commit; forcing dry-run mode and disabling publish. Set dry-run: true explicitly to suppress this warning.

Use of deprecated 'version-resolver.patch.labels' field detected. Please migrate. This field will be removed in a future release. To migrate, either add 'semver-increment: "patch"' to a pre-existing 'type: changelog' category, or move the labels from 'version-resolver.patch.labels' to a new category with type 'version-resolver' and 'semver-increment' set to 'patch'. Migration documentation: https://github.com/release-drafter/release-drafter/pull/1558

Use of deprecated 'version-resolver.minor.labels' field detected. Please migrate. This field will be removed in a future release. To migrate, either add 'semver-increment: "minor"' to a pre-existing 'type: changelog' category, or move the labels from 'version-resolver.minor.labels' to a new category with type 'version-resolver' and 'semver-increment' set to 'minor'. Migration documentation: https://github.com/release-drafter/release-drafter/pull/1558

Use of deprecated 'version-resolver.major.labels' field detected. Please migrate. This field will be removed in a future release. To migrate, either add 'semver-increment: "major"' to a pre-existing 'type: changelog' category, or move the labels from 'version-resolver.major.labels' to a new category with type 'version-resolver' and 'semver-increment' set to 'major'. Migration documentation: https://github.com/release-drafter/release-drafter/pull/1558

Use of deprecated 'exclude-labels' or 'exclude-paths' field detected. Please migrate. This field will be removed in a future release. To migrate, add the correspoding labels or paths to a 'type: "pre-exclude"' category. Migration documentation: https://github.com/release-drafter/release-drafter/pull/1558

Use of deprecated 'categories[*].label' or 'categories[*].labels' field detected on category "🧰 Maintenance". Please migrate. This field will be removed in a future release. To migrate, move the labels into the category's 'when' condition. Migration documentation: https://github.com/release-drafter/release-drafter/pull/1558

Use of deprecated 'categories[*].label' or 'categories[*].labels' field detected on category "🐛 Bug Fixes". Please migrate. This field will be removed in a future release. To migrate, move the labels into the category's 'when' condition. Migration documentation: https://github.com/release-drafter/release-drafter/pull/1558