Bump github.com/google/go-cmp from 0.2.0 to 0.3.0

[dependabot-preview]

Bumps github.com/google/go-cmp from 0.2.0 to 0.3.0.

Release notes

Sourced from github.com/google/go-cmp's releases.

v0.3.0

Added features:

• (#108) The _ field is always ignored when comparing a struct.
• (#109) The naming rules for cmp.Transformer is relaxed and clearly specified.
• (#82) cmpopts.AcyclicTransformer makes it easier to write a transformer that avoids infinite recursion when the output type contains the input type.
• (#126) cmpopts.IgnoreSliceElements and cmpopts.IgnoreMapEntries provide the ability to ignore specific slice elements or map entries.
• (#123) cmp.Reporter provides users the ability to add custom difference reporters.
• (#119) cmp.PathStep.Values provide the current reflect.Value for the x and y arguments at that given path step.

Bug fixes:

• (#87) Fixed proper comparing of slices where one is a sub-slice of the other.

Reporter changes:

• (#124) The cmp.Diff output has been completely re-written to provide a unified diff of the two Go objects as a literal in pseudo-Go syntax (example).
• (#131) The default reporter has built-in heuristics to detect whether a string or a byte-slice looks like binary data or human readable text, and can provide more humanly readable differences in certain use-cases. For example, a string may be detecting as containing multiple lines of text, for which it will print the difference based on the lines.

Commits

• 6f77996 Improve clarity of compareAny (#132)
• b5cce89 Implement specialized diffing for slices (#131)
• 49488b4 Use concrete types for path steps (#129)
• 0376dcf Add IgnoreSliceElements and IgnoreMapEntries helpers (#126)
• 3177a94 Export the Reporter API (#123)
• 2940eda Implement a unified difference reporter (#124)
• c812816 Nudge people to use custom comparers rather than Ignore/Allow Unexported opti...
• 2e500c5 Add validator option once at state creation (#128)
• 64cb04e Add BenchmarkBytes (#125)
• fd81a2b Evaluate options even if values are invalid (#121)
• Additional commits viewable in compare view

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