fix(CI): stop testing on Node 14 (#66)

Author: MichaelDeBoey

.github/workflows/validate.yml

@@ -42,7 +42,7 @@ jobs:
       fail-fast: false
 
       matrix:
-        node: [14, 16, 18, 20]
+        node: [16, 18, 20]
         os: [ubuntu-latest, windows-latest, macos-latest]
         project: [blob, fetch, file, form-data, stream]