🐛 Fix OTP version null check (#211)

* Fix OTP version null check

* Revert "Fix OTP version null check"

This reverts commit 2c433c16ac.

* Check that the resolved versions contain the spec.

* Only perform semver version resolution when spec is not an rc and version-type is not strict

* Move version inclusion check to the end of the function, when we may have prepended a 'v'

* Refactor function return

* Add test case for strict version resolving a spec that is no available version

src/setup-beam.js

@@ -375,6 +375,11 @@ function getVersionFromSpec(spec, versions, maybePrependWithV0) {
   if (maybePrependWithV0 && v != null) {
     v = maybePrependWithV(v)
   }
+
+  if (!versions.includes(v)) {
+    v = null
+  }
+
   return v
 }