Update "More things are coming in 2020" to 2021

Author: vks

source/index.pug

@@ -45,4 +45,4 @@ ul#intro-feature-list
         i.fa.fa-meteor
       h3.intro-feature-title
         a(href='#') Stay tuned!
-      p.intro-feature-desc More things are coming in 2020. Stay in touch!
+      p.intro-feature-desc More things are coming in 2021. Stay in touch!