chore: Remove Node 18 from unit tests

.github/workflows/build_and_test_branches.yml

@@ -37,7 +37,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                node: [18.x, 20.x, 22.x]
+                node: [20.x, 22.x]
         steps:
             - uses: actions/checkout@v4
             - name: Use Node.js ${{ matrix.node }}

.github/workflows/build_and_test_master.yml

@@ -34,7 +34,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                node: [18.x, 20.x, 22.x]
+                node: [20.x, 22.x]
         steps:
             - uses: actions/checkout@v4
             - name: Use Node.js ${{ matrix.node }}

.github/workflows/build_and_test_pr.yml

@@ -36,7 +36,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                node: [18.x, 20.x, 22.x]
+                node: [20.x, 22.x]
         steps:
             - uses: actions/checkout@v4
             - name: Use Node.js ${{ matrix.node }}