v2.0.0 beta release

changelog: update for v1.4.0 (peak#358)

command/mv: fix option usage (peak#338)

* Some of the command options are not working in move command since we forget passing cli.Context flags to Copy struct. Use generic NewCopy constructor for both copy/move.

goreleaser: rename github to tap (peak#308)

changelog: add auto-region issue (peak#257)

goreleaser: disable before hooks (peak#197)

Test cases with wildcards and List calls are flaky due to gofakes3 with
changes in peak#188. Disabling before hooks until it is fixed.

readme: fix wording

core: retry on "NoCredentialProviders" aws error

core: add GCS and S3 transfer acceleration support

HACKED TOGETHER FOR TEMPORARY USE
DO NOT MERGE