Don't test on v1.10

[jishnub]

Looking at the somewhat random test failure in https://github.com/JuliaApproximation/ApproxFun.jl/actions/runs/5701500758/job/15452279928, perhaps it's best to wait for v1.10 to become more stable

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (0e78219) 28.06% compared to head (8f20f32) 28.06%.
Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #899   +/-   ##
=======================================
  Coverage   28.06%   28.06%           
=======================================
  Files          11       11           
  Lines         563      563           
=======================================
  Hits          158      158           
  Misses        405      405           

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[dlfivefifty]

I think it’s a smart move, this is why I refuse to support master and try to put off supporting new releases until the RC stage