near-api-js 0.38.0

• Retry on "Failed to fetch" error 126bd3d5
• Fix documentation links for JSON-RPC provider 1c824e08
• Merge pull request #508 from near/feat/expose-experimental-protocol-config 960b798f
• Merge branch 'master' into feat/expose-experimental-protocol-config 922ec06e
• Update to always use EXPERIMENTAL_protocol_config 5ae80625
• Gas price method added to provider (#521) 7896384a
• fixed doc-types e197b83c
• fixed the fallback detection 7ca8a375
• yarn build a48c2940
• implement a fallback to EXPERIMENTAL_genesis_config for experimental_protocolConfig method implementation c6dd9fe5
• yarn fix 766dd9db
• feat: Exposed experimental_protocolConfig provider method f1549d95

https://github.com/near/near-api-js/compare/v0.37.0...v0.38.0