chore: comment typos (#1621)

lib/index.js

@@ -185,7 +185,7 @@ var component = normalizer(
     // from the devtools.
     code += `\ncomponent.options.__file = ${JSON.stringify(rawShortFilePath.replace(/\\/g, '/'))}`
   } else if (options.exposeFilename) {
-    // Libraies can opt-in to expose their components' filenames in production builds.
+    // Libraries can opt-in to expose their components' filenames in production builds.
     // For security reasons, only expose the file's basename in production.
     code += `\ncomponent.options.__file = ${JSON.stringify(filename)}`
   }

lib/runtime/componentNormalizer.js

@@ -71,7 +71,7 @@ export default function normalizeComponent (
       // for template-only hot-reload because in that case the render fn doesn't
       // go through the normalizer
       options._injectStyles = hook
-      // register for functioal component in vue file
+      // register for functional component in vue file
       var originalRender = options.render
       options.render = function renderWithStyleInjection (h, context) {
         hook.call(context)