Revert "Drop support for julia 1.0-1.3 (#221)"

[lgoettgens]

No description provided.

[codecov]

Codecov Report

Merging #224 (ddf0fda) into master (de25cfa) will decrease coverage by 12.17%.
Report is 1 commits behind head on master.
The diff coverage is 51.73%.

@@             Coverage Diff             @@
##           master     #224       +/-   ##
===========================================
- Coverage   88.33%   76.17%   -12.17%     
===========================================
  Files          10       11        +1     
  Lines         506      768      +262     
===========================================
+ Hits          447      585      +138     
- Misses         59      183      +124     

Flag	Coverage Δ
unittests	76.17% <51.73%> (-12.17%)	⬇️

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

Files	Coverage Δ
src/Aqua.jl	73.07% <ø> (ø)
src/persistent_tasks.jl	87.71% <100.00%> (+0.44%)	⬆️
src/pkg/Versions.jl	51.36% <51.36%> (ø)

... and 3 files with indirect coverage changes

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[lgoettgens]

As already expected, `Test = "1.0" fails on julia 1.0-1.3 (log)

[lgoettgens]

Test = "<0.0.1, 1" indeed seems to work. Thanks @DilumAluthge!

[lgoettgens]

@fingolfin What do you think? Should we enable compatibility with julia 1.0 again (by merging this PR)? If yes, I should look through the changes in detail, because there were a few conflicts when reverting stuff.

If you approve this, could you change the required CI jobs back to needing 1.0-1.3 for ubuntu, 1.0 for windows and macOS, and instead remove 1.4 for windows and macOS?

[hyrodium]

I believe it is important that the code written for Julia 1.0 works with the latest versions of Julia and some packages. On the other hand, I think it is rare for users who do not upgrade their Julia version to only upgrade the version of Aqua.jl, so I feel there is no need to actively support Julia versions prior to 1.6 (LTS).

Sorry for repeating my previous comment (#216 (comment)), but I feel it would be nice to reduce the costs to maintain this package.

[fingolfin]

Honestly I don't think support for the older Julia versions is worth the hassle.

However, if you are willing to take care of the burden, I certainly won't object! In the worst case, we could still re-remove it later.

As such, I think you should make the final decision, Lars. I won't complain either way :-)

[lgoettgens]

I would like to continue with this PR. As said, we can drop support again at any point in time, if maintaining becomes too much of a hassle.

If you approve this, could you change the required CI jobs back to needing 1.0-1.3 for ubuntu, 1.0 for windows and macOS, and instead remove 1.4 for windows and macOS?

@fingolfin could you please adapt the "required" CI jobs as listed here? And feel free to merge once that is done.