fix(cli): pass options to semver.valid() for loose version validation

[mldangelo]

Summary

The --loose flag was not being applied when validating input versions.

Problem

$ semver 1.2.3beta -l
# Expected: 1.2.3-beta (exit 0)
# Actual: exit 1

The options object (containing loose: true) was already being passed to coerce() and satisfies(), but the filter() validation step was calling semver.valid(v) without it.

Fix

-  return semver.valid(v)
+  return semver.valid(v, options)

Test plan

• Added regression test for 1.2.3beta -l
• All existing tests pass
• 100% code coverage maintained