Streaming dataset generation (#6)

fixed spacing issue

used multiprocess instead of multiprocessing to fix weird mac os issue

modified to take advantage of multiple CPUs locally

Update Wikipedia metadata (#3958)

Update files from the datasets library (from 1.16.0)

Update files from the datasets library (from 1.6.0)

Update files from the datasets library (from 1.5.0)

Update files from the datasets library (from 1.4.0)

Update files from the datasets library (from 1.2.0)

Update files from the datasets library (from 1.0.0)