fix: allow absolute paths (#96)

Author: simllll

lib/module.js

@@ -37,7 +37,7 @@ function nuxtPurgeCss (moduleOptions) {
   const { mode, enabled, ...config } = Object.assign({}, DEFAULTS, mergedConfig)
 
   // transform relative paths
-  config.paths = glob.sync(config.paths.map(p => path.join(srcDir, p)))
+  config.paths = glob.sync(config.paths.map(p => path.isAbsolute(p) ? p : path.join(srcDir, p)))
 
   if (!enabled) {
     const msg = this.options.dev ? 'PurgeCSS is not enabled because you are in dev mode' : 'Module is not enabled'