print extra Info in svyglm And add keyword arguments to svyglm

[harsharora21]

svyglm can be called with either all keyword args or all positional args. It also adds defaults for some arguments.
svyglm now prints extra info - Degrees of Freedom, Null Deviance, Residual Deviance, AIC

[codecov-commenter]

Codecov Report

Merging #18 (55380c9) into main (8adaf6c) will decrease coverage by 2.78%.
The diff coverage is 14.28%.

@@            Coverage Diff             @@
##             main      #18      +/-   ##
==========================================
- Coverage   64.92%   62.14%   -2.79%     
==========================================
  Files           4        4              
  Lines         134      140       +6     
==========================================
  Hits           87       87              
- Misses         47       53       +6     

Impacted Files	Coverage Δ
src/svyglm.jl	82.97% <14.28%> (-12.15%)	⬇️

---

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 8adaf6c...55380c9. Read the comment docs.