Trailing comment in YAML causes `Error marshaling to json: invalid character '}' looking for beginning of object key string` when output type is JSON

[NiklasRosenstein]

Sops v3.9.1

To reproduce:

$ echo -e 'foo: bar\n#Hello world' | sops --input-type yaml --output-type yaml -e /dev/stdin > test.yaml
$ sops -d test.yaml 
foo: bar
#Hello world
$ sops --output-type json --decrypt --input-type yaml test.yaml 
Error dumping file: Error marshaling to json: invalid character '}' looking for beginning of object key string