fix: deprecation warnings and upgrade all dependencies (#172)

Fixes #155

Author: maxlapides

.github/workflows/check-dist.yml

@@ -21,12 +21,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
-      - name: Set Node.js 12.x
-        uses: actions/setup-node@v2.5.1
+      - name: Set Node.js 18.x
+        uses: actions/setup-node@v3
         with:
-          node-version: 12.x
+          node-version: 18
 
       - name: Install dependencies
         run: npm ci

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
   build: # make sure build/ci work properly
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: dart-lang/setup-dart@v1
       - run: |
           npm install
@@ -19,7 +19,7 @@ jobs:
   test: # make sure the action works on a clean machine without building
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: dart-lang/setup-dart@v1
       - uses: ./
         with: