Add some tests for bad network conditions

.github/workflows/node.js.yml

@@ -17,7 +17,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [22.x]
+        node-version: [20.x, 22.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     steps:
@@ -28,5 +28,5 @@ jobs:
         node-version: ${{ matrix.node-version }}
         cache: 'npm'
     - run: npm ci
-    - run: npm run build --if-present
-    - run: npm test
+    - run: npm run build
+    - run: npm run coverage

.gitignore

@@ -1,6 +1,7 @@
 /node_modules
 /dist
 /build
+/coverage
 # npm pack output
 /*.tgz
 /*.crt

README.md

@@ -4,7 +4,7 @@
 ![GitHub Actions Workflow Status](https://img.shields.io/github/actions/workflow/status/boronine/h2tunnel/node.js.yml)
 
 A CLI tool and Node.js library for a popular "tunneling" workflow, similar to the proprietary [ngrok](https://ngrok.com/)
-or the openssh-based `ssh -L` solution. All in [less than 600 LOC](https://github.com/boronine/h2tunnel/blob/main/src/h2tunnel.ts)
+or the openssh-based `ssh -L` solution. All in [less than 700 LOC](https://github.com/boronine/h2tunnel/blob/main/src/h2tunnel.ts)
 with no dependencies.
 
 ![Diagram](https://raw.githubusercontent.com/boronine/h2tunnel/main/diagram.drawio.svg)