Switch to @mole-inc/bin-wrapper

[peterbe]

Fixes #147

I'm not even sure how to run the tests locally, but let's see what .github/workflows/test.yml can make of this.

At least now, when I run...

❯ npm ls semver-regex
gifsicle@7.0.1 /Users/peterbe/dev/JAVASCRIPT/gifsicle-bin
└─┬ @mole-inc/bin-wrapper@8.0.1
  └─┬ bin-version-check@5.1.0
    └─┬ bin-version@6.0.0
      └─┬ find-versions@5.1.0
        └── semver-regex@4.0.5

I get a version of semver-regex that isn't known to be insecure.

[j9t]

(Concerned about the same issue, but took the path of filing a PR against bin-wrapper.)