Revert "Switch from @oclif/dev-cli to Oclif"

This reverts commit 63dcb54.

This is due to the new Oclif package not supporting templated file names
& paths, which makes it impossible to easily deploy to GitHub Releases.
Once templates are supported, we can fix this backup. Just need to make
sure that the manifest file names match, update ci.yml to correctly
upload them, and make sure that the paths inside the manifest are
correct.

Author: pimterry

build-release.sh

@@ -43,7 +43,7 @@ echo
 echo "BUILDING FOR $TARGET_PLATFORM"
 echo
 
-oclif pack tarballs --targets=$TARGET
+oclif-dev pack --targets=$TARGET
 
 echo
 echo "BUILT"