Update dependencies, use Julia 1.3 on docs and coverage and release 0.4

[abelsiqueira]

First release supporting LinearOperators 1.0.
Preparing for Krylov 1.0.

[dpo]

Great, thanks. Give me a chance to review #159 before releasing. Probably later this week.

[coveralls]

Coverage increased (+0.2%) to 97.154% when pulling 8c20ad2 on abelsiqueira:release-0.4.0 into adc5bec on JuliaSmoothOptimizers:master.

[codecov]

Codecov Report

Merging #167 into master will decrease coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #167      +/-   ##
==========================================
- Coverage   97.19%   97.15%   -0.05%     
==========================================
  Files          28       28              
  Lines        2495     2495              
==========================================
- Hits         2425     2424       -1     
- Misses         70       71       +1

Impacted Files	Coverage Δ
src/craig.jl	97.05% <0%> (-0.99%)	⬇️

---

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 adc5bec...8c20ad2. Read the comment docs.

[amontoison]

For Krylov.jl 1.0, I think we could do the release when LNLQ and USYMLQR will be added.

[dpo]

I think this needs to be rebased.

[abelsiqueira]

This is rebased now.

[dpo]

Thank you.