breaking changes: Open_Graph_meta 設置更改，可配置其它參數

feature: 更新 Facebook sdk 到 v15
improvement: 更新 plugins.yml
Remove: 移除 meta keywords

layout/includes/third-party/card-post-count/fb.pug

@@ -1,4 +1,4 @@
-- const fbSDKVer = 'v14.0'
+- const fbSDKVer = 'v15.0'
 - const fbSDK = theme.messenger.enable ? `https://connect.facebook.net/${theme.facebook_comments.lang}/sdk/xfbml.customerchat.js#xfbml=1&version=${fbSDKVer}` : `https://connect.facebook.net/${theme.facebook_comments.lang}/sdk.js#xfbml=1&version=${fbSDKVer}`
 
 script.

layout/includes/third-party/chat/messenger.pug

@@ -9,7 +9,7 @@ script.
   window.fbAsyncInit = function() {
     FB.init({
       xfbml: true,
-      version: 'v14.0'
+      version: 'v15.0'
     });
   };
 

layout/includes/third-party/comments/facebook_comments.pug

@@ -1,4 +1,4 @@
-- const fbSDKVer = 'v14.0'
+- const fbSDKVer = 'v15.0'
 - const fbSDK = theme.messenger.enable ? `https://connect.facebook.net/${theme.facebook_comments.lang}/sdk/xfbml.customerchat.js#xfbml=1&version=${fbSDKVer}` : `https://connect.facebook.net/${theme.facebook_comments.lang}/sdk.js#xfbml=1&version=${fbSDKVer}`
 
 script.

layout/includes/third-party/pjax.pug

@@ -7,7 +7,7 @@ if theme.pjax.exclude
 
 - let choose = theme.comments.use
 if choose
-  if theme.Open_Graph_meta && (choose.includes('Livere') || choose.includes('Utterances') || choose.includes('Giscus'))
+  if theme.Open_Graph_meta.enable && (choose.includes('Livere') || choose.includes('Utterances') || choose.includes('Giscus'))
     - pjaxSelectors.unshift('meta[property="og:image"]', 'meta[property="og:title"]', 'meta[property="og:url"]')
   if choose.includes('Utterances') || choose.includes('Giscus')
     - pjaxSelectors.unshift('link[rel="canonical"]')