v0.7.37

ApproxFunBase v0.7.37

Diff since v0.7.36

Merged pull requests:

• Use promote_eltypeof instead of mapreduce (#272) (@jishnub)
• skip duplicate CI (#273) (@jishnub)
• Update CI duplicate skip (#274) (@jishnub)
• Refactor anyplustimes (#276) (@jishnub)
• Add skip hook to test job (#277) (@jishnub)
• Use default settings for duplicate CI skip (#278) (@jishnub)
• Make Toeplitz operator immutable (#279) (@jishnub)
• Aggressive constprop in Fun * Operator (#280) (@jishnub)