v0.35.0

• Allow opt in buf.gen.yaml files to be either a single string, or a list of strings. Both of the following forms are accepted, and result in foo=bar,baz,bat:

version: v1beta1
plugins:
  - name: foo
    out: out
    opt: foo=bar,baz,bat

version: v1beta1
plugins:
  - name: foo
    out: out
    opt:
      - foo=bar
      - baz
      - bat