'in' Filters with too many elements fail with "Uncaught RangeError"

Fixes mapbox/mapbox-gl-js#1782

If too many elements (varies by environment, but appx 1-2k) are used for an 'in' filter, it will fail with "Uncaught RangeError: Maximum call stack size exceeded". This is because the logical comparison of many infix comarisons (eg "(p['foo']==='bar') || (p['foo']==='cat') || ...") becomes too long for the v8natives to handle.

index.js

@@ -32,12 +32,9 @@ var operators = {
     '<=': strictInfix('<='),
     '>=': strictInfix('>='),
     'in': function(_, key) {
-        return (key==='$type')?
-            Array.prototype.slice.call(arguments, 2).map(function(value) {
-                return '(' + operators['=='](_, key, value) + ')';
-            }).join('||') || 'false'
-            :
-            JSON.stringify(Array.prototype.slice.call(arguments, 2))+'.indexOf(p['+JSON.stringify(key)+'])>=0';
+        return '[' + Array.prototype.slice.call(arguments, 2).map(function(value) {
+            return '(' + operators['=='](_, key, value) + ')';
+        }).join(',') + '].indexOf(true) >= 0';
     },
     '!in': function() {
         return '!(' + operators.in.apply(this, arguments) + ')';