v0.55.0

• Error if version: is not set in buf.yaml. This is one of the few breaking changes we must make before v1.0 to guarantee stability for the future. If you do not have a version set, simply add version: v1beta1 to the top of your buf.yaml.
• Support BUF_TOKEN for authentication. buf will now look for a token in the BUF_TOKEN environment variable, falling back to .netrc as set via buf login.
• Add support for using remote plugins with local source files.
• Add per-file overrides for managed mode.
• Fix issue with the module cache where multiple simulataneous downloads would result in a temporarily-corrupted cache.
• Hide verbose messaing behind the --verbose (-v) flag.
• Add --debug flag to print out debug logging.