Update node version in CI (#88)

Author: Naturalclar

.github/workflows/ci.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-18.04
     strategy:
       matrix:
-        node-version: [12]
+        node-version: [16]
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
@@ -27,7 +27,7 @@ jobs:
     runs-on: ubuntu-18.04
     strategy:
       matrix:
-        node-version: [12]
+        node-version: [16]
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
@@ -48,7 +48,7 @@ jobs:
     runs-on: ubuntu-18.04
     strategy:
       matrix:
-        node-version: [12]
+        node-version: [16]
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
@@ -69,7 +69,7 @@ jobs:
     runs-on: ubuntu-18.04
     strategy:
       matrix:
-        node-version: [12]
+        node-version: [16]
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1