Fix type for shareClassSharesOutstanding in ticker details response

Minor Breaking Change

While this is not a major version release, a bug-fix in this release introduced a very minor breaking change:
shareClassSharesOutstanding inside the TickerDetails response class changed type from Int? to Long? to support large amounts of shares outstanding (shoutout to @wangtieqiao for finding and contributing this fix!).

What's Changed

• add REST/websocket specs and gradle tasks to update them by @mmoghaddam385 in #68
• update financials limit property docs. by @antdjohns in #70
• Changed TickerDetails.shareClassSharesOutstanding type by @wangtieqiao in #71
• Update version by @mmoghaddam385 in #72

New Contributors

• @antdjohns made their first contribution in #70
• @wangtieqiao made their first contribution in #71

Full Changelog: v4.2.0...v4.2.1