Set up Gradle 6.3

scripts/updateWrappers.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+set -o errexit
+set -o errtrace
+set -o nounset
+set -o pipefail
+
+export WRAPPER_VERSION="${WRAPPER_VERSION:-6.3}"
+
+find . -name 'build.gradle' | while read -r file; do
+    parentdir="$(dirname "$file")"
+    ( echo "Updating [${parentdir}]" && cd "$parentdir" && ./gradlew wrapper --gradle-version "${WRAPPER_VERSION}" )
+done