Julia 1.0 compat

[fonsp]

I want to use Configurations.jl in Pluto, but we support Julia 1.0 and up, the compatibility of Configurations is bound to >=1.3. It seems like this package was the limiting factor.

[codecov]

Codecov Report

Merging #2 (ce2be83) into master (ce11dc0) will decrease coverage by 0.56%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master       #2      +/-   ##
==========================================
- Coverage   80.19%   79.62%   -0.57%     
==========================================
  Files           6        6              
  Lines        2095     2120      +25     
==========================================
+ Hits         1680     1688       +8     
- Misses        415      432      +17     

Impacted Files	Coverage Δ
src/ExproniconLite.jl	0.00% <ø> (ø)
src/analysis.jl	71.31% <0.00%> (-0.87%)	⬇️
src/transform.jl	83.62% <0.00%> (-0.38%)	⬇️
src/printing.jl	84.15% <0.00%> (-0.21%)	⬇️

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[fonsp]

Configurations.jl passes on Julia 1.0 if this branch of ExproniconLite.jl is used! Yay

[Roger-luo]

Thanks, this package is generated by Expronicon (see https://discourse.julialang.org/t/ann-exproniconlite-jl-the-mlstyle-generated-dependency-free-package-for-low-latency/59247) to cover all the cases for var_str it would require a Julia parser update (JuliaLang/julia#32408) but I guess luckily MLStyle doesn't generate any corner cases, so we could make it compatible with 1.0 using this!

[Roger-luo]

This should be fixed in Roger-luo/Expronicon.jl@fe47408
the new patch release should be compatible with 1.0