Bump github.com/pkg/errors from 0.8.1 to 0.9.1 in /orc8r/cloud/go

[dependabot]

Bumps github.com/pkg/errors from 0.8.1 to 0.9.1.

Release notes

Sourced from github.com/pkg/errors's releases.

errors 0.9.1

pkg/errors 0.9.1 is a bug fix release for errors 0.9.0. This restore the previous behaviour on Cause method, this behaviour was changed on the PR: #215 and many breaking changes was produced by that.

errors 0.9.0 is a preparation release for a 1.0 final release. Also we were working on removing support for Go 1.8, 1.9 and 1.10 and earlier, and become compatible this package with new way of errors on Go 1.13.

We tried to move into runtime.CallerFrames but this was not possible, you can show the explanation here: Issue 188.

The motivation for do the backward compatible this package with Go 1.13 is that you can migrate the easy way for this to the new way.

Now you could use the methods, Is and As, and the Unwrap() interface like on the standard library.

The method Cause is now compatible with fmt.Errorf("%w", err) and with the Unwrap() interface.

On the same way the methods related with wrapping on this package now are compatible with Cause and Unwrap() interface.

Improvements

• .travis.yml Now use make file.
• reduce allocations when printing stack traces. Thanks @​cstockton
• Reduce allocations in Stacktrace.Format
• Add Support to Go 1.13. Thanks @​jayschwa, @​Sherlock-Holo and @​puellanivis.
• Add json.Marshaler support to the Frame type. Thanks @​flimzy

Bugs fixed

• .travis.yml Adjust Go versions. Thanks @​komuw, @​aperezg
• minor fix in an example to print Stack Trace. Thanks @​bep.
• Remove not necessary code.
• Clean up documentation. Thanks @​seh.

Commits

• 614d223 Revert "Support Go 1.13 error chains in Cause (#215)" (#220)
• 49f8f61 Support Go 1.13 error chains in Cause (#215)
• 004deef remove unnecessary use of fmt.Sprintf (#217)
• 6d954f5 feat: support std errors functions (#213)
• 7f95ac1 Add support for Go 1.13 error chains (#206)
• 91f1693 travis.yml: add Go 1.13
• ca0248e fix travis, 1.10 doesnt support by unconvert anymore
• 27936f6 travis.yml: add Go 1.12 (#200)
• 856c240 Add json.Marshaler support to the Frame type. (#197)
• ffb6e22 Reduce allocations in StackTrace.Format (#194)
• Additional commits viewable in compare view

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