Upgrade Hood and Gradle

[rachelcarmena]

Changes

• Hood 0.8.1
• Gradle should be updated to use variables in plugin DSL. In this case, "$hoodVersion". Other configuration improvements with this version could be made in next pull requests.

Details

Manual changes on:

    modified:   build.gradle
    modified:   helios-benchmarks/build.gradle

The rest of the files have been updated with gradle wrapper --gradle-version 6.4.1:

    modified:   gradle/wrapper/gradle-wrapper.jar
    modified:   gradle/wrapper/gradle-wrapper.properties
    modified:   gradlew
    modified:   gradlew.bat

[47erbot]

Hood benchmark comparison: :heavy_check_mark: Decoding (Threshold: 878.483626202263)

Benchmark	Value
master_benchmark	16717.05327794091
helios_benchmark	17185.640675274393

:warning: Decodingfromraw (Threshold: 250.0)

Benchmark	Value
master_benchmark	10593.538693249156
helios_benchmark	10389.327260988994

:red_circle: Parsing (Threshold: 250.0)

Benchmark	Value
master_benchmark	28533.88116262605
helios_benchmark	27611.70206937746

[rachelcarmena]

Thanks for the reviews @calvellido @AdrianRaFo :raised_hands: