tidyfast 0.4.0

• Updated maintainer email
• Added note that dtplyr has several overlapping functions now with tidyfast
• Also fixed issue that data.table 1.15.0 created (minor).
• Added keep argument to dt_separate()

tidyfast 0.3.2

• Fixes discrepancies between tidyr and tidyfast, specifically with dt_fill() and dt_case_when()
• Changed to cpp11 instead of Rcpp (since needs are fairly basic, no need for the advanced features)
• Updated GitHub checking

tidyfast 0.2.1

• Initial release of tidyfast!