fix: sanitize helm version string by removing leading 'v' characters #25
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As detailed here some helm versions report their short version string without leading 'v'. In that case, fluvio-helm will throw away the first digit of the major version.
This PR strips all leading 'v's, if they exist and adds a small unit test. I refrained from pulling in semver as dev dependency to test with semver, but this might be the better option.