made the type of unavailableOnNode explicit since it can no longer be…

… inferred

stopify-continuations-compiler/src/common/cannotCapture.ts

@@ -43,7 +43,7 @@ function cannotCapture(node: t.CallExpression | t.NewExpression): boolean  {
   return knowns.includes(node.callee.name);
 }
 
-const unavailableOnNode = [  ];
+const unavailableOnNode : String[] = [  ];
 const knownBuiltIns = knowns.filter(x => !unavailableOnNode.includes(x))
   .map(o => eval(o));