docs: add release notes doc

Notes for previous releases taken from Git tag messages.

Author: bgilbert

docs/release-notes.md

@@ -0,0 +1,87 @@
+# Release notes
+
+## stream-metadata-go 0.4.2 (unreleased)
+
+Changes:
+
+- Add release notes doc
+
+
+## stream-metadata-go 0.4.1 (2023-01-30)
+
+Changes:
+
+- Add support for Secure Execution
+
+
+## stream-metadata-go 0.4.0 (2022-08-11)
+
+- Drop vendored dependencies
+- Drop support for Go 1.15 and 1.16
+- Fix tests
+
+
+## stream-metadata-go 0.3.0 (2022-04-15)
+
+- Switch KubeVirt image struct from `SingleImage` to new `ContainerImage`
+- Add `ContainerImage.DigestRef` field so we can record both the recommended
+  pullspec and one that includes the digest
+
+
+## stream-metadata-go 0.2.1 (2022-04-08)
+
+- Add support for VirtualBox images
+
+
+## stream-metadata-go 0.2.0 (2022-04-05)
+
+- Rename `RegionObject`/`RegionImage` to `SingleObject`/`SingleImage`;
+  add compatibility aliases
+- Drop `KubeVirtContainerDisk` types in favor of generic ones
+
+
+## stream-metadata-go 0.1.8 (2022-03-15)
+
+- Add support for KubeVirt images
+
+
+## stream-metadata-go 0.1.7 (2022-01-25)
+
+- Fix Windows build by dropping renameio dependency
+
+
+## stream-metadata-go 0.1.6 (2021-11-29)
+
+- Add support for Nutanix images
+
+
+## stream-metadata-go 0.1.5 (2021-11-02)
+
+- Add support for IBMCloud/PowerVS images
+- Add `GcpImage.Release` field in stream metadata
+- Drop `omitempty` from mandatory GcpImage fields
+
+
+## stream-metadata-go 0.1.4 (2021-10-06)
+
+- Make `Artifact.Signature` `omitempty`
+
+
+## stream-metadata-go 0.1.3 (2021-09-16)
+
+- Add `Metadata.Generator` field
+
+
+## stream-metadata-go 0.1.2 (2021-09-15)
+
+- Add support for Alibaba Cloud (`aliyun`) cloud images
+
+
+## stream-metadata-go 0.1.1 (2021-07-20)
+
+- Add support for Azure Stack images
+
+
+## stream-metadata-go 0.1.0 (2021-04-26)
+
+- Initial release