Update devDependencies and switch to Node.js 16/npm 8

Author: XhmikosR

.github/workflows/ci.yml

@@ -4,7 +4,7 @@ on: [push, pull_request]
 
 env:
   FORCE_COLOR: 2
-  NODE: 14.x
+  NODE: 16
   RUBY: 2.7
 
 jobs:

Gemfile.lock

@@ -14,7 +14,7 @@ GEM
     ffi (1.15.4-x64-mingw32)
     forwardable-extended (2.6.0)
     http_parser.rb (0.6.0)
-    i18n (1.8.10)
+    i18n (1.8.11)
       concurrent-ruby (~> 1.0)
     jekyll (4.2.1)
       addressable (~> 2.4)
@@ -77,4 +77,4 @@ DEPENDENCIES
   wdm (~> 0.1.1)
 
 BUNDLED WITH
-   2.2.28
+   2.2.31