Bump Gradle to 6.5

[marandaneto]

📢 Type of change

• Bugfix
• New feature
• Enhancement
• Refactoring

📜 Description

💡 Motivation and Context

💚 How did you test it?

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• All tests passing

🔮 Next steps

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (master@9b51cc4). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #454   +/-   ##
=========================================
  Coverage          ?   60.26%           
  Complexity        ?      816           
=========================================
  Files             ?       93           
  Lines             ?     3727           
  Branches          ?      359           
=========================================
  Hits              ?     2246           
  Misses            ?     1328           
  Partials          ?      153           

Impacted Files	Coverage Δ	Complexity Δ
.../src/main/java/io/sentry/core/cache/DiskCache.java	51.42% <0.00%> (ø)	12.00% <0.00%> (?%)
...rc/main/java/io/sentry/core/protocol/Contexts.java	4.76% <0.00%> (ø)	1.00% <0.00%> (?%)
.../java/io/sentry/core/protocol/OperatingSystem.java	0.00% <0.00%> (ø)	0.00% <0.00%> (?%)
...main/java/io/sentry/core/HttpTransportFactory.java	100.00% <0.00%> (ø)	1.00% <0.00%> (?%)
...in/java/io/sentry/core/hints/SessionStartHint.java	100.00% <0.00%> (ø)	1.00% <0.00%> (?%)
...src/main/java/io/sentry/core/protocol/Request.java	14.81% <0.00%> (ø)	3.00% <0.00%> (?%)
...java/io/sentry/core/transport/TransportResult.java	91.66% <0.00%> (ø)	3.00% <0.00%> (?%)
...-core/src/main/java/io/sentry/core/HubAdapter.java	4.25% <0.00%> (ø)	2.00% <0.00%> (?%)
...java/io/sentry/core/protocol/SentryStackTrace.java	58.33% <0.00%> (ø)	4.00% <0.00%> (?%)
...in/java/io/sentry/core/protocol/SentryPackage.java	0.00% <0.00%> (ø)	0.00% <0.00%> (?%)
... and 83 more

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