ci: Revert support for node.js 18 (#4518) (#4537)

Revert "ci: Start supporting node.js 18 (#4518)"

This reverts commit 9ee292cd17.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -22,9 +22,9 @@ A clear and concise description of what you expected to happen.
 
 **Environment (please complete the following information):**
 
-- OS: [e.g. Ubuntu Linux 22.04]
-- n8n Version [e.g. 0.201.0]
-- Node.js Version [e.g. 16.17.0]
+- OS: [e.g. Ubuntu Linux 18.04]
+- n8n Version [e.g. 0.119.0]
+- Node.js Version [e.g. 14.16.0]
 - Database system [e.g. SQLite; n8n uses SQLite as default otherwise changed]
 - Operation mode [e.g. own; operation modes are `own`, `main` and `queue`. Default is `own`]
 

.github/workflows/ci-master.yml

@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [14.x, 16.x, 18.x]
+        node-version: [14.x, 16.x]
 
     steps:
       - uses: actions/checkout@v3

.github/workflows/ci-postgres-mysql.yml

@@ -15,17 +15,12 @@ jobs:
       DB_MYSQLDB_PASSWORD: password
       DB_POSTGRESDB_PASSWORD: password
 
-    strategy:
-      matrix:
-        node-version: [14.x, 16.x, 18.x]
-
     steps:
       - uses: actions/checkout@v3
 
-      - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v3
+      - uses: actions/setup-node@v3
         with:
-          node-version: ${{ matrix.node-version }}
+          node-version: 16.x
           cache: 'npm'
 
       - name: Install npm and dependencies

.github/workflows/ci-pull-requests.yml

@@ -10,7 +10,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [14.x, 16.x, 18.x]
+        node-version: [14.x, 16.x]
 
     steps:
       - uses: actions/checkout@v3

.github/workflows/test-workflows.yml

@@ -13,7 +13,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [16.x, 18.x]
+        node-version: [16.x]
     steps:
       - name: Checkout
         uses: actions/checkout@v3