estudy2 0.10.0

Update examples to COVID-19 related
Equip the package with the demo Shiny app

estudy2 0.9.3

Fix a bug in the vignette and examples

estudy2 0.9.2

Fix a bug in the vignette and examples

estudy2 0.9.1

Fix a bug in examples of returns()

estudy2 0.9.0

Fix documentation for brown_warner_1985()
Fix documentation for car_brown_warner1985()
Update documentation on the returning object for each test
Implement the CAR non-parametric rank test described in Corrado in the extension by Cowan (1992, p. 6)
Change returning object from list to data.frame for all CAR parametric tests, add mean return over the CAR period
Add validation and handling of NA to returns()

estudy2 0.8.5

Replace function tseries::get.hist.quote() by quantmod::getSymbols()
Remove ELE.PA ticker from all tickers vectors in examples, vignettes, and data