make script base cost a constant

src/Script.js

@@ -417,7 +417,7 @@ function parseOnlyRamCalculate(server, code, workerScript) {
 
         // Finally, walk the reference map and generate a ram cost. The initial set of keys to scan
         // are those that start with __SPECIAL_INITIAL_MODULE__.
-        let ram = 1.4;
+        let ram = CONSTANTS.ScriptBaseRamCost;
         const unresolvedRefs = Object.keys(dependencyMap).filter(s => s.startsWith(initialModule));
         const resolvedRefs = new Set();
         while (unresolvedRefs.length > 0) {