Update plugin library

Revert "Fix getOrDefault()" since this workaround has been merged into
the plugin library.

This reverts commit 6f400bf.

build.sbt

@@ -22,4 +22,4 @@ shrinkResources := true
 typedResources := false
 resConfigs := Seq("zh-rCN")
 
-libraryDependencies += "com.github.shadowsocks" %% "plugin" % "0.0.1"
+libraryDependencies += "com.github.shadowsocks" %% "plugin" % "0.0.2"

src/main/scala/com/github/shadowsocks/plugin/obfs_local/ConfigFragment.scala

@@ -14,20 +14,13 @@ class ConfigFragment extends PreferenceFragment {
 
   override def onCreatePreferences(bundle: Bundle, key: String): Unit = addPreferencesFromResource(R.xml.config)
 
-  def getOrDefault(options: PluginOptions, key: String, defaultValue: String): String = {
-    options.get(key) match {
-      case v: String => v
-      case _ => defaultValue
-    }
-  }
-
   def onInitializePluginOptions(options: PluginOptions): Unit = {
     this.options = options
     for ((key, defaultValue) <- Array(("obfs", "http"), ("obfs-host", "cloudfront.net"))) {
       val pref = findPreference(key)
       pref match {
-        case ddp: DropDownPreference => ddp.setValue(getOrDefault(options, key, defaultValue))
-        case etp: EditTextPreference => etp.setText(getOrDefault(options, key, defaultValue))
+        case ddp: DropDownPreference => ddp.setValue(options.getOrDefault(key, defaultValue))
+        case etp: EditTextPreference => etp.setText(options.getOrDefault(key, defaultValue))
       }
       pref.setOnPreferenceChangeListener((_, value) => {
         options.put(key, value.toString)