ci: removes node 13 as a testing target

Author: Addono

.github/workflows/release.yml

@@ -9,7 +9,7 @@ jobs:
 
  strategy:
  matrix:
- node-version: [12.x, 13.x, 14.x]
+ node-version: [12.x, 14.x]
 
  steps:
  - uses: actions/checkout@v2