Dependency free is the way to be

Several bug fixes and typo corrections exist in the background of this update while the main feature to celebrate is that the package no longer has any dependencies. It still imports packages of course. Some additional functionality was also added into the base functions with no threat to backwards compatibility. One may now specify how many decimal places the results of ts2clm() should be measured to. This is useful if one is finding climatologies for values with very high precision. It is also now possible to tell category() which season of the MHW it should tell you. The default is to provide the range of seasons, but now one may also choose the start, peak, or end season during the MHW.