fix(deps): update module github.com/google/go-cmp to v0.5.8

This MR contains the following updates:

Package	Type	Update	Change
github.com/google/go-cmp	require	patch	v0.5.5 -> v0.5.8

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Release Notes

google/go-cmp

v0.5.8

Compare Source

Reporter changes:

• (#​293) Fix printing of types in reporter output for interface and pointer types
• (#​294) Use string formatting for slice of bytes in more circumstances

Dependency changes:

• (#​292) Update minimum supported version to go1.13 and remove xerrors dependency

v0.5.7

Compare Source

Reporter changes:

• (#​266) Fix textual printing of byte slices
• (#​275) Reduce minimum length for specialize string diffing
• (#​276) Use any alias instead of interface{}

Code cleanup changes:

• (#​281) Update minimum supported version to go1.11
• (#​282) Drop hacks to work around Go reflection bugs in Go1.9
• (#​285) Add //go:build lines
• (#​262) Fix staticcheck findings
• (#​263) Avoid shadowing variable
• (#​268) Use sha256 in test
• (#​271) Fix spelling mistakes
• (#​269) Change build status badge

v0.5.6

Compare Source

Reporter changes:

• (#​258) Print as text if mostly text
• (#​259) Cleanup edit groups after coalescing
• (#​260) Avoid diffing by lines if inefficient

Minor documentation changes:

• (#​256) Fix typo in path.go

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