Create release 1.8.0 (#893) Create release 1.8.0 with updates in - ONNX_VERSION_NUMBER: ONNX version numbmer - VERSION_NUMBER: ONNX-TF version number - .github/workflows/test-backend.yml: versions for ONNX and TF - .github/workflows/test-modelzoo.yml: versions for ONNX and TF - doc/support_status.md: support status for the latest masters - doc/support_status_v1_8_0.md: support status for the release 1.8.0 Signed-off-by: Chin Huang <chhuang@us.ibm.com>

chinhuang007 committed Apr 13, 2021