reproducible 2.0.9

Enhancements

new function isUpdated() to determine whether a cached object has been updated;
makeRelative() is now exported for use downstream (e.g., SpaDES.core);
new functions getRelative() and normPathRel() for improved symlink handling (#362);
messaging is improved for Cache with the function named instead of just cacheId
messaging for prepInputs: minor changes
more edge cases for Checksums dealt with, so fewer unneeded downloads
wrapSpatRaster (wrap for file-backed spatRaster objects) fixes for more edge cases
postProcessTo can now use sf::gdal_utils for the case of from is a gridded object and to is a polygon vector. This appears to be between 2x and 10x faster in tests.
postProcessTo does a pre-crop (with buffer) to make the projectTo faster. When both from and to are vector objects, this pre-crop appears to create slivers in some cases. This step is now skipped for these cases.
Cache can now deal with unnamed functions, e.g., Cache((function(x) x)(1)). It will be refered to as "headless".
terra would fail if internet was unavailable, even when internet is not necessary, due to needing to retrieve projection information. Many cases where this happens will now divert to use sf.
Cache can now skip calculating objSize, which can take a non-trivial amount of time for large, complicated objects; see reproducibleOptions()

Filenames for some classes returned ""; now returns NULL so character vectors are only pointers to files
Cache on a terra object that writes file to disk, when quick argument is specified was failing, always creating the same object; fixed with #PR368
useDBI was incorrectly used if a user had set the option prior to package loading. Now works as expected.
several other minor
preProcess deals better with more cases of nested paths in archives.
more edge cases corrected for inputPaths