Bump jest dependency and fix tests

Author: Americas

package.json

@@ -19,7 +19,7 @@
   "scripts": {
     "changelog": "github-changelog-generator --owner=uphold --repo=process-manager --future-release=v$npm_package_version > CHANGELOG.md",
     "lint": "eslint src test",
-    "test": "jest --coverage --runInBand --verbose",
+    "test": "jest --coverage --verbose",
     "version": "npm run changelog && git add -A CHANGELOG.md"
   },
   "dependencies": {
@@ -29,9 +29,13 @@
     "@uphold/github-changelog-generator": "^0.4.1",
     "eslint": "^3.12.2",
     "eslint-config-seegno": "^8.0.1",
-    "jest": "^19.0.1",
+    "jest": "^27.5.1",
     "pre-commit": "^1.2.2"
   },
+  "jest": {
+    "restoreMocks": true,
+    "testEnvironment": "node"
+  },
   "engines": {
     "node": ">=7.6"
   },

src/index.js

@@ -77,6 +77,11 @@ class ProcessManager {
 
   hook(type, ...args) {
     const hooks = this.hooks.filter(hook => hook.type === type);
+
+    if (hooks.length === 0) {
+      return;
+    }
+
     const promises = hooks.map(({ handler, timeoutError }) => {
       return Promise.race([
         utils.reflect(handler, args),