Merge pull request #3 from yutotakano/add-ci · yutotakano/opus@85cd613

The job was canceled because "_9_4_8_ubuntu-latest" failed.

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Cache not found for keys: macOS-9.4.8-171e84056a4e18e4b7a920ae78e14f046977096b1f3b2cc435213b63aa65ab31, macOS-9.4.8-