Update devDependencies and drop Node.js < 18 support (#41)

Author: XhmikosR

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest]
-        node: [14, 16, 18, 20]
+        node: [18, 20]
 
     steps:
       - name: Clone repository

.github/workflows/lint.yml

@@ -10,7 +10,7 @@ on:
 
 env:
   FORCE_COLOR: 2
-  NODE: 18
+  NODE: 20
 
 permissions:
   contents: read