Revert "ci(test): use --runInBand"

This reverts commit d8cb4b8.

.github/workflows/ci.yml

@@ -54,7 +54,7 @@ jobs:
           tar xzf nvim-macos.tar.gz
           export PATH="${PATH}:node_modules/.bin:$(pwd)/nvim-osx64/bin"
           nvim --version
-          yarn test-build
+          yarn test-build --maxWorkers=4
       - if: matrix.os == 'ubuntu-latest'
         name: yarn test on Ubuntu
         run: |
@@ -64,7 +64,7 @@ jobs:
           tar xzf nvim-linux64.tar.gz
           export PATH="${PATH}:node_modules/.bin:$(pwd)/nvim-linux64/bin"
           nvim --version
-          yarn test-build
+          yarn test-build --maxWorkers=2
 
       - name: Codecov
         uses: codecov/codecov-action@v2.0.2

package.json

@@ -12,7 +12,7 @@
     "lint:typecheck": "tsc -p tsconfig.json",
     "build": "node esbuild.js",
     "test": "./node_modules/.bin/jest --forceExit",
-    "test-build": "./node_modules/.bin/jest --runInBand --coverage --forceExit",
+    "test-build": "./node_modules/.bin/jest --coverage --forceExit",
     "prepare": "node esbuild.js"
   },
   "repository": {

src/__tests__/helper.ts

@@ -70,6 +70,7 @@ export class Helper extends EventEmitter {
     this.nvim.removeAllListeners()
     this.nvim = null
     if (this.proc) {
+      this.proc.unref()
       terminate(this.proc)
       this.proc = null
     }