extend Plugin host api to supply a version

MacPass/MPPluginHost.h

@@ -37,6 +37,7 @@ FOUNDATION_EXPORT NSString *const MPPluginHostPluginBundleIdentifiyerKey;
 /* List of all plugins known to the plugin manager. Disabled plugins are also present! */
 @property (readonly, copy) NSArray <MPPlugin __kindof*> *plugins;
 @property (nonatomic, readonly) BOOL loadUnsecurePlugins;
+@property (readonly, copy) NSString *version;
 
 + (instancetype)sharedHost;
 

MacPass/MPPluginHost.m

@@ -93,6 +93,11 @@ NSString *const MPPluginHostPluginBundleIdentifiyerKey = @"MPPluginHostPluginBun
   return self;
 }
 
+- (NSString *)version {
+  NSString *version = NSBundle.mainBundle.infoDictionary[(NSString *)kCFBundleVersionKey];
+  return version;
+}
+
 - (NSArray<MPPlugin *> *)plugins {
   return [self.mutablePlugins copy];
 }