refactor: rename loader to load as not to confuse webpack loader

lib/load/config.js

@@ -0,0 +1,14 @@
+const fs = require('fs-extra');
+const path = require('path');
+
+module.exports = function loadConfig(siteDir, deleteCache = true) {
+  const configPath = path.resolve(siteDir, 'siteConfig.js');
+  if (deleteCache) {
+    delete require.cache[configPath];
+  }
+  let config = {};
+  if (fs.existsSync(configPath)) {
+    config = require(configPath); // eslint-disable-line
+  }
+  return config;
+};