update kramdown

Author: agusmakmun

Diff for: Gemfile.lock

@@ -67,7 +67,7 @@ GEM
       jekyll-theme-time-machine (= 0.1.1)
       jekyll-titles-from-headings (= 0.5.1)
       jemoji (= 0.10.2)
-      kramdown (= 1.17.0)
+      kramdown (= 2.3.0)
       liquid (= 4.0.1)
       listen (= 3.1.5)
       mercenary (~> 0.3)
@@ -94,7 +94,7 @@ GEM
       i18n (~> 0.7)
       jekyll-sass-converter (~> 1.0)
       jekyll-watch (~> 2.0)
-      kramdown (~> 1.14)
+      kramdown (~> 2.3.0)
       liquid (~> 4.0)
       mercenary (~> 0.3.3)
       pathutil (~> 0.9)
@@ -191,7 +191,7 @@ GEM
       gemoji (~> 3.0)
       html-pipeline (~> 2.2)
       jekyll (~> 3.0)
-    kramdown (1.17.0)
+    kramdown (2.3.0)
     liquid (4.0.1)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)