1.0 CBL-Mariner December 2020 update

1. Fixed 14 CVEs:

   • curl: CVE-2020-8177 and CVE-2020-8231;
   • glib: CVE-2020-35457;
   • kernel: 7 CVEs fixed by the version update;
   • python-pip: CVE-2019-20916;
   • python-py: CVE-2020-29651;
   • qemu: CVE-2020-27821;
   • unbound: CVE-2020-28935.

2. Updated kernel to version 5.4.83.

3. Added an option to build distroless containers.

4. Enabled and/or fixed 10+ package build tests.

5. Added new versions of Kubernetes: 1.17, 1.18, and 1.19.

6. Switched the tooling and build instructions to use Go 1.15 instead of 1.13.

7. ARM64 ISOs and VHDXs can now be produced.

8. Updated documentation for build instructions + minor documentation fixes.