Adapt to Julia 1.8.

[maleadt]

Ref JuliaLang/julia#42151

[codecov]

Codecov Report

Merging #252 (9c75c8a) into master (7bf4184) will increase coverage by 2.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #252      +/-   ##
==========================================
+ Coverage   83.62%   85.65%   +2.03%     
==========================================
  Files          22       22              
  Lines        2064     2064              
==========================================
+ Hits         1726     1768      +42     
+ Misses        338      296      -42     

Impacted Files	Coverage Δ
src/runtime.jl	52.38% <ø> (ø)
src/bpf.jl	92.85% <0.00%> (-7.15%)	⬇️
src/ptx.jl	94.18% <0.00%> (+1.16%)	⬆️
src/interface.jl	85.18% <0.00%> (+1.23%)	⬆️
src/driver.jl	92.35% <0.00%> (+3.18%)	⬆️
src/irgen.jl	94.39% <0.00%> (+4.14%)	⬆️
src/mcgen.jl	97.36% <0.00%> (+7.89%)	⬆️
src/jlgen.jl	79.88% <0.00%> (+8.87%)	⬆️

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