Bump podspec version to 3.2.1
Bump podspec version to 3.2.1

piwik/piwik-sdk-ios,artcom/piwik-sdk-ios,collectivehealth/piwik-sdk-ios,piwik/piwik-sdk-ios,wedrive-core/piwik-sdk-ios,piwik/piwik-sdk-ios,fireflyexperience/piwik-sdk-ios