`packer-sdc plugin-check` outputs cryptic error string: Version needs to be set

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#### Overview of the Issue

Executing `packer-sdc plugin-check ` outputs the following error string:
> 2022/08/22 17:21:02 Version needs to be set

Although the `packer-sdc` documentation and usage has no information about this, and I saw no error message similar to this in the source code, I did notice there seems to be a potential secret requirement for plugins: a `version/version.go` file. This seemed like a possible fix. However, even after populating this file appropriately according to two other official plugins as a reference, the behavior did not deviate at all from the above. Thus, this behavior is unfortunately contrary to published documentation, usage, source code, and other official plugins as a reference.

I should also note the plugin currently passes acceptance testing with the latest version of Packer and the Packer SDK, so it should also conceivably pass the `plugin-check` too.

#### Reproduction Steps

`packer-sdc plugin-check `

### Packer Plugin SDK version

0.3.1

### Operating system and Environment details

Ubuntu 22.04

### Log Fragments and crash.log files

n/a