in `qgraph::qgraph()` `edge_color` should be `edge.color`

[vandenman]

I could have opened an issue but this seemed a bit too trivial for that.

Currently, you get this warning

library(easybgm)
library(bgms)
data <- Wenchuan
fit2 <- easybgm(data, type = "ordinal",
                iter = 1000, save = TRUE,
                centrality = TRUE)

rr <- plot_edgeevidence(fit2, split = TRUE)
Warning message:
In qgraph::qgraph(graph_inc, edge_color = graph_color, layout = args$layout_avg,  :
  The following arguments are not documented and likely not arguments of qgraph and thus ignored: edge_color

after this PR not anymore.

[KarolineHuth]

included in a recent commit