Revise interface

[michakraus]

Fixes #58.

[codecov]

Codecov Report

Attention: Patch coverage is 52.17391% with 55 lines in your changes are missing coverage. Please review.

Project coverage is 31.77%. Comparing base (39fa6b4) to head (ae02af8).

Files	Patch %	Lines
src/point_vortices_linear.jl	47.36%	20 Missing ⚠️
src/point_vortices.jl	66.66%	8 Missing ⚠️
src/toda_lattice.jl	0.00%	6 Missing ⚠️
src/lotka_volterra_2d_equations.jl	66.66%	5 Missing ⚠️
src/lotka_volterra_4d.jl	37.50%	5 Missing ⚠️
src/massless_charged_particle.jl	0.00%	4 Missing ⚠️
src/pendulum.jl	0.00%	4 Missing ⚠️
src/lotka_volterra_2d.jl	0.00%	2 Missing ⚠️
src/lotka_volterra_4d_lagrangian.jl	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #60      +/-   ##
==========================================
+ Coverage   28.59%   31.77%   +3.18%     
==========================================
  Files          28       28              
  Lines        1969     1948      -21     
==========================================
+ Hits          563      619      +56     
+ Misses       1406     1329      -77     

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