Dropping support for node 16 (#1082)

* updating CI actions

* node 16 is no longer supported

* changing support for node to 18

* adding changes to package-lock.json

Author: Janther

.github/workflows/CI.yml

@@ -13,10 +13,10 @@ jobs:
     name: Lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 16
+          node-version: 18
           cache: 'npm'
       - name: Install
         run: npm install
@@ -27,10 +27,10 @@ jobs:
     name: Test production
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 16
+          node-version: 18
           cache: 'npm'
       - name: Install
         run: npm install
@@ -45,10 +45,10 @@ jobs:
     name: Prettier V2
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 16
+          node-version: 18
           cache: 'npm'
       - name: Install
         run: npm install
@@ -66,10 +66,10 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [16, 18, 20]
+        node: [18, 20, 22]
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node }}
           cache: 'npm'
@@ -79,27 +79,27 @@ jobs:
         run: npm run test:all
 
   test_macos:
-    name: Test on MacOS with Node 16
+    name: Test on MacOS with Node 18
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 16
+          node-version: 18
           cache: 'npm'
       - name: Install
         run: npm install
       - name: Run tests
         run: npm run test:all
 
   test_windows:
-    name: Test on Windows with Node 16
+    name: Test on Windows with Node 18
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 16
+          node-version: 18
           cache: 'npm'
       - name: Install
         run: npm install

.nvmrc

@@ -1 +1 @@
-16
+18

package-lock.json

@@ -84,7 +84,7 @@
   },
   "homepage": "https://github.com/prettier-solidity/prettier-plugin-solidity#readme",
   "engines": {
-    "node": ">=16"
+    "node": ">=18"
   },
   "devDependencies": {
     "@babel/code-frame": "^7.26.2",