bugs corrections in tabularise() and chart.nls()

better X/Y selection in chart.nls and autoplot.nls

Merge branch 'main' of github.com:SciViews/modelit

# Conflicts:
#	NEWS.md

Bug corrections in autoplot.nls()

v1.4.2

Corrections in autoplot.nls()

Better tabularise() for summary.(g)lm, better equations for nls objects

v1.4.1

Slight adjustments in equations

tabularise() methods for lm, glm, nls

Several tabularise (default, coef, glance, tidy) are added for lm, glm, and nls objects, allowing to output nicely formatted tables of results using {flextable}.

First version with chart, as.function, fit_model, etc.

v1.0.0

version 1.0 with chart, as.function, fit_model, etc.