Update module stretchr/testify to v1.4.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/stretchr/testify	require	minor	v1.3.0 -> v1.4.0

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Release Notes

stretchr/testify

v1.4.0

Compare Source

The 1.4.0 release includes new matchers and bug fixes. See the v.1.4.0 milestone for a complete list of closed issues associated with this release.

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[codecov]

Codecov Report

Merging #8 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master       #8   +/-   ##
=======================================
  Coverage   74.69%   74.69%           
=======================================
  Files           1        1           
  Lines          83       83           
=======================================
  Hits           62       62           
  Misses         12       12           
  Partials        9        9

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