build: Drop node v16 and add node v21 to test matrix. Update nsqd ver…

…sion.

.github/workflows/main.yaml

@@ -13,7 +13,7 @@ jobs:
     timeout-minutes: 10
     strategy:
       matrix:
-        node: [16,18,20]
+        node: [18,20,21]
     steps:
       - uses: actions/checkout@v3
 
@@ -27,10 +27,10 @@ jobs:
           sudo apt-get -y install libsnappy-dev python3 build-essential
       - name: "Install nsq"
         run: |
-          NSQ_DIST="nsq-1.2.1.linux-amd64.go1.16.6"
+          NSQ_DIST="nsq-1.3.0.linux-amd64.go1.21.5"
           curl -sSL "https://bitly-downloads.s3.amazonaws.com/nsq/${NSQ_DIST}.tar.gz" \
             | tar -xzv --strip-components=1
       - run: npm install
       - run: |
           export PATH=bin:$PATH
-          npm test
+          npm test