Added 1D expected improvement method, now working on ND

[ludoro]

No description provided.

[codecov]

Codecov Report

Merging #35 into master will decrease coverage by 44.48%.
The diff coverage is 82.75%.

@@             Coverage Diff             @@
##           master      #35       +/-   ##
===========================================
- Coverage   94.17%   49.68%   -44.49%     
===========================================
  Files           5        5               
  Lines         412      481       +69     
===========================================
- Hits          388      239      -149     
- Misses         24      242      +218

Impacted Files	Coverage Δ
src/Surrogates.jl	100% <ø> (ø)	⬆️
src/Optimization.jl	9.02% <82.75%> (-78.8%)	⬇️

---

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[codecov]

Codecov Report

Merging #35 into master will decrease coverage by 44.48%.
The diff coverage is 82.75%.

@@             Coverage Diff             @@
##           master      #35       +/-   ##
===========================================
- Coverage   94.17%   49.68%   -44.49%     
===========================================
  Files           5        5               
  Lines         412      481       +69     
===========================================
- Hits          388      239      -149     
- Misses         24      242      +218

Impacted Files	Coverage Δ
src/Surrogates.jl	100% <ø> (ø)	⬆️
src/Optimization.jl	9.02% <82.75%> (-78.8%)	⬇️

---

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 a949542...7382fe4. Read the comment docs.

[ChrisRackauckas]

looks good.