update LTS version, drop v1.0 support

[aviatesk]

Let's live on the cutting edge :)

[codecov]

Codecov Report

Merging #499 (988d98b) into master (716d7f6) will decrease coverage by 3.96%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##           master     #499      +/-   ##
==========================================
- Coverage   86.73%   82.76%   -3.97%     
==========================================
  Files          12       12              
  Lines        2488     2443      -45     
==========================================
- Hits         2158     2022     -136     
- Misses        330      421      +91     

Impacted Files	Coverage Δ
src/precompile.jl	0.00% <0.00%> (ø)
src/construct.jl	89.49% <50.00%> (-1.78%)	⬇️
src/utils.jl	84.86% <91.66%> (-1.21%)	⬇️
src/commands.jl	92.91% <100.00%> (-0.42%)	⬇️
src/interpret.jl	71.98% <100.00%> (-13.58%)	⬇️
src/optimize.jl	96.92% <100.00%> (-0.62%)	⬇️
src/packagedef.jl	86.95% <100.00%> (-4.54%)	⬇️
src/types.jl	73.24% <100.00%> (-1.28%)	⬇️
src/builtins.jl	68.52% <0.00%> (-8.13%)	⬇️
... and 8 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 716d7f6...988d98b. Read the comment docs.

[simeonschaub]

Will need to update the Julia compat as well as the minor version

[pfitzseb]

FWIW, I'd kinda like to keep 1.0 compat for the VS Code extension.
It's not super important though since I suppose we can disable some features for old Julia versions.

[KristofferC]

VSCode could just still use JuliaInterpreter 0.8.21 on 1.0? Or is the worry that future features won't be available?

[pfitzseb]

We're currently vendoring and side-loading all packages. Shipping multiple versions of a package would be feasible but fairly annoying.
Then again, only supporting a debugger on LTS and newer doesn't seem too bad.

[aviatesk]

It's painful to try to keep v1.0 compat imho mostly because this package heavily interacts with Julia internals, as we just see yet another example at #500 (comment).
So I'd like to ask you to drop the debugger support for older Julia versions.

[pfitzseb]

Alright, :)

[aviatesk]

@timholy @pfitzseb @KristofferC Can we tag 0.9? It's quite big change, but since it is a minor bump, it shouldn't break any existing system and I think we can gradually update dependents in the ecosystem.