fix: lookup current shorting snx rewards rate & duration from contract

[kelonye]

• Updates the weekly snx rewards to be looked up from the rewards contract.
• https://discord.com/channels/413890591840272394/549492529288970251/827537988304764948

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[cypress[bot]]

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Test summary

2 • 0 • 0 • 0 • 0

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Run details

Project	kwenta
Status	Passed
Commit	99fe5db2f8 ℹ️
Started	Apr 4, 2021 7:37 PM
Ended	Apr 4, 2021 7:40 PM
Duration	02:51 💡
OS	Linux Ubuntu - 20.04
Browser	Chrome 89

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[evgenyboxer]

@vbstreetz looks good! what has changed in the lock file?

[kelonye]

@vbstreetz looks good! what has changed in the lock file?

Not sure. Shall we gitignore lock files?

[kelonye]

Updated computation to https://github.com/Synthetixio/stats/blob/master/queries/yield-farming/useRewardsContractInfoQuery.ts#L79-L88