Re-enable AOT test with Julia nightly

[tkf]

AOT with nightly was disabled in #930 to workaround this failure

┌ Warning: Could not use exact versions of packages in manifest, re-resolving
└ @ Pkg.Operations /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.8/Pkg/src/Operations.jl:1510
Precompiling project...
  ✓ CompilerSupportLibraries_jll
  ✓ OpenBLAS_jll
  ✓ libblastrampoline_jll
  ✓ MacroTools
  ✓ PyCall
  5 dependencies successfully precompiled in 6 seconds. 4 already precompiled.
  Activating project at `~/.julia/environments/v1.8`
ERROR: Unsatisfiable requirements detected for package OpenBLAS_jll [4536629a]:
 OpenBLAS_jll [4536629a] log:
 ├─possible versions are: 0.3.17 or uninstalled
 └─restricted to versions 0.3.13 by an explicit requirement — no versions left

https://github.com/JuliaPy/PyCall.jl/runs/3986291641?check_suite_focus=true#step:9:41

Opening an issue to re-enable this as a reminder.

[codecov-commenter]

Codecov Report

Merging #931 (bf242eb) into master (f83a11f) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #931   +/-   ##
=======================================
  Coverage   67.97%   67.97%           
=======================================
  Files          20       20           
  Lines        2033     2033           
=======================================
  Hits         1382     1382           
  Misses        651      651           

Flag	Coverage Δ
unittests	67.97% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update f83a11f...bf242eb. Read the comment docs.

[tkf]

It looks like PackageCompiler.jl itself is not testing with nightly at the moment https://github.com/JuliaLang/PackageCompiler.jl/commit/81a01d37e008228542068c58e9882a65525b4010