Function to simplify converting p-values to asterisks

## Arguments

- x
p values to convert to stars

- includeMarginal
logical value whether to include a symbol for marginally significant >.05 but < .10 p-values. Defaults to

`FALSE`

.

## Examples

```
star(c(.0005, .001, .005, .01, .02, .05, .08, .1, .5, 1))
#> [1] *** *** ** ** * *
```