Update module bflad/tfproviderlint to v0.21.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
bflad/tfproviderlint	require	minor	v0.18.0 -> v0.21.0

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Release Notes

bflad/tfproviderlint

v0.21.0

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FEATURES

• New Check: R019: check for (*schema.ResourceData).HasChanges() receiver method usage with many arguments
• New Check: V009: check for validation.StringMatch() calls with empty message argument
• New Check: V010: check for validation.StringDoesNotMatch() calls with empty message argument

BUG FIXES

• passes/AT009: Correct constant detection for acctest.RandStringFromCharSet() calls that can be acctest.RandString (#​215)

v0.20.0

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FEATURES

• New Check: AT009: check for acctest.RandStringFromCharSet() calls that can be acctest.RandString

ENHANCEMENTS

• passes/helper/acctest: Pass for collecting acctest.RandStringFromCharSet() calls
• passes/АТ001: Add optional -ignored-filename-suffixes and -ignored-filename-prefixes flags (#​210)

v0.19.0

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FEATURES

• New Check: R018: check for time.Sleep() function usage

ENHANCEMENTS

• passes/commentignore: Support multiple comma separated keys and extra // comments (#​208)
• passes/stdlib: Pass for collecting time.Sleep() calls

BUG FIXES

• helper/astutils: Prevent (*types.Info).ObjectOf() type assertion panics (#​207)

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