community/nim: upgrade to 2.2.0 and include Nimble 0.16.2
Updated nim to version 2.2.0 and nimble to 0.16.2. Nimble is installed via this package now, per upstream's recommendation.
Updated nim to version 2.2.0 and nimble to 0.16.2. Nimble is installed via this package now, per upstream's recommendation.