Precompilation statements for nightly

[t-bltg]

• add nightly precompile statements (currently 1.8).
• update SnoopCompile bot to generate nightly statements.

Close #4079.

[codecov]

Codecov Report

Merging #4082 (b40f0fc) into master (3e8db45) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4082      +/-   ##
==========================================
- Coverage   62.21%   62.20%   -0.02%     
==========================================
  Files          29       29              
  Lines        7292     7295       +3     
==========================================
+ Hits         4537     4538       +1     
- Misses       2755     2757       +2     

Impacted Files	Coverage Δ
src/types.jl	47.82% <0.00%> (-4.35%)	⬇️
src/args.jl	72.45% <0.00%> (-0.12%)	⬇️
src/backends.jl	64.60% <0.00%> (ø)
src/backends/unicodeplots.jl	53.37% <0.00%> (+0.63%)	⬆️

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