Update Gradle to 6.6.1

[arturbosch]

No description provided.

[codecov]

Codecov Report

Merging #3016 into master will decrease coverage by 0.37%.
The diff coverage is 48.88%.

@@             Coverage Diff              @@
##             master    #3016      +/-   ##
============================================
- Coverage     79.53%   79.15%   -0.38%     
- Complexity     2532     2543      +11     
============================================
  Files           431      434       +3     
  Lines          7637     7714      +77     
  Branches       1447     1465      +18     
============================================
+ Hits           6074     6106      +32     
- Misses          795      822      +27     
- Partials        768      786      +18     

Impacted Files	Coverage Δ	Complexity Δ
...ithub/detekt/custom/CustomChecksConfigValidator.kt	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...in/io/github/detekt/custom/CustomChecksProvider.kt	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...github/detekt/metrics/ComplexityReportGenerator.kt	85.18% <0.00%> (-7.41%)	9.00 <0.00> (ø)
.../gitlab/arturbosch/detekt/rules/empty/EmptyRule.kt	94.11% <ø> (ø)	12.00 <0.00> (ø)
...otlin/io/github/detekt/custom/SpekTestDiscovery.kt	64.81% <64.81%> (ø)	11.00 <11.00> (?)
...otlin/io/gitlab/arturbosch/detekt/core/Analyzer.kt	67.64% <66.66%> (ø)	6.00 <0.00> (ø)
...ch/detekt/api/internal/ValidatableConfiguration.kt	100.00% <100.00%> (ø)	0.00 <0.00> (ø)
...rbosch/detekt/rules/complexity/TooManyFunctions.kt	96.77% <100.00%> (ø)	25.00 <0.00> (ø)
... and 1 more

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