refactor: update math/base/assert/is-even to follow latest project conventions

Author: vivekmaurya001

lib/node_modules/@stdlib/math/base/assert/is-even/manifest.json

@@ -41,7 +41,8 @@
         "@stdlib/math/base/assert/is-integer",
         "@stdlib/napi/export",
         "@stdlib/napi/argv",
-        "@stdlib/napi/argv-double"
+        "@stdlib/napi/argv-double",
+        "@stdlib/napi/create-double"
       ]
     },
     {

lib/node_modules/@stdlib/math/base/assert/is-even/src/addon.c

@@ -19,10 +19,10 @@
 #include "stdlib/math/base/assert/is_even.h"
 #include "stdlib/napi/argv.h"
 #include "stdlib/napi/argv_double.h"
+#include "stdlib/napi/create_double.h"
 #include "stdlib/napi/export.h"
 #include <node_api.h>
-#include <assert.h>
-
+#include <stdint.h>
 
 /**
 * Receives JavaScript callback invocation data.
@@ -32,17 +32,10 @@
 * @return       Node-API value
 */
 static napi_value addon( napi_env env, napi_callback_info info ) {
-    STDLIB_NAPI_ARGV( env, info, argv, argc, 1 );
-    STDLIB_NAPI_ARGV_DOUBLE( env, x, argv, 0 );
-
-    // Check if the number is even:
-    bool result = stdlib_base_is_even( x );
-
-    napi_value v;
-    napi_status status = napi_get_boolean( env, result, &v );
-    assert( status == napi_ok );
-
-    return v;
+	STDLIB_NAPI_ARGV( env, info, argv, argc, 1 );
+	STDLIB_NAPI_ARGV_DOUBLE( env, x, argv, 0 );
+	STDLIB_NAPI_CREATE_DOUBLE( env, stdlib_base_is_even( x ), out );
+	return out;
 }
 
 STDLIB_NAPI_MODULE_EXPORT_FCN( addon )