Struct and naming update

[rodrigomha]

To update Project.toml when PSY update naming structs in master.

closes #38

[codecov]

Codecov Report

Merging #45 into master will increase coverage by 0.29%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #45      +/-   ##
==========================================
+ Coverage   74.88%   75.17%   +0.29%     
==========================================
  Files          29       29              
  Lines        1043     1015      -28     
==========================================
- Hits          781      763      -18     
+ Misses        262      252      -10     

Impacted Files	Coverage Δ
src/LITS.jl	100.00% <ø> (ø)
src/base/definitions.jl	0.00% <ø> (ø)
src/base/simulation.jl	94.00% <ø> (-0.15%)	⬇️
src/models/branch.jl	73.07% <ø> (-1.93%)	⬇️
src/models/inverter_models/DCside_models.jl	100.00% <ø> (ø)
src/base/ports.jl	100.00% <100.00%> (ø)
src/models/device.jl	100.00% <100.00%> (ø)
src/models/inverter_models/converter_models.jl	100.00% <100.00%> (ø)
src/models/inverter_models/filter_models.jl	100.00% <100.00%> (ø)
...dels/inverter_models/frequency_estimator_models.jl	100.00% <100.00%> (ø)
... and 13 more