fix test because error message seems changed

Author: Apollon77

test/commands/select.spec.js

@@ -72,7 +72,7 @@ describe("The 'select' method", function () {
                             assert.strictEqual(client.selected_db, undefined, 'default db should be undefined');
                             client.select(9999, function (err) {
                                 assert.equal(err.code, 'ERR');
-                                assert.equal(err.message, 'ERR invalid DB index');
+                                assert.equal(err.message, 'ERR DB index is out of range');
                                 done();
                             });
                         });
@@ -97,7 +97,7 @@ describe("The 'select' method", function () {
 
                             client.on('error', function (err) {
                                 assert.strictEqual(err.command, 'SELECT');
-                                assert.equal(err.message, 'ERR invalid DB index');
+                                assert.equal(err.message, 'ERR DB index is out of range');
                                 done();
                             });