Bumps org.apache.maven.plugins:maven-surefire-plugin from 3.1.2 to 3.2.1.

• df9f657 [maven-release-plugin] prepare release surefire-3.2.1
• 0910b75 Fix formatting
• 97c84a1 [maven-release-plugin] prepare for next development iteration
• ad0639f [maven-release-plugin] prepare release surefire-3.2.0
• edfb965 [SUREFIRE-2196] maven-surefire-report-plugin:failsafe-report-only failed: Unm...
• 0a5dba8 [SUREFIRE-2188] Upgrade to Parent 40
• 5a09438 [SUREFIRE-2202] NullPointerException if super class meets specific condition
• 176937d Simplify temp dir creation
• 9b79bda [SUREFIRE-1124] Support forkNumber in environment variables
• 2966964 Fix TestNG web site URL
• Additional commits viewable in compare view

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