React-SDK - 3.1.0

• Error initializing client. The core client or user promise(s) rejected. (#255)
• Unable to determine if feature "{your-feature-key}" is enabled because User ID is not set(#255)

• Bumped Optimizely JS SDK version in use (#255)
• Resolve dependabot dependency vulnerabilities (#245, #247, #248, #251, #253)
• Add node versions during testing (#249)

Full Changelog: https://github.com/optimizely/react-sdk/compare/3.0.1...3.1.0