v2.2.0

Changes

• Feature/Deprecation: Call getComponent and getComponents with nextState; deprecate accessing location directly in favor of nextState.location there (#3298, Upgrade Guide)
• Bugfix: Do not ignore extraneous slashes in matching (#3285)
• Bugfix: Do not unnecessarily set empty className on <Link> (#3288)
• Minor: Update PropTypes (#3218)
• Minor: Move ES module build from es6/ to es/ (#3295)
• Minor: Do not include unused deprecation logic in production builds (#3296)