chore: disable hest's injectGlobals (#824)

Signed-off-by: Jan Kowalleck <jan.kowalleck@gmail.com>

jest.config.js

@@ -172,7 +172,7 @@ module.exports = {
   testMatch: [
   //    "**/__tests__/**/*.[jt]s?(x)",
     '**/?(*.)+(spec|test).js'
-  ]
+  ],
 
   // An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
   // testPathIgnorePatterns: [
@@ -214,4 +214,8 @@ module.exports = {
 
   // Whether to use watchman for file crawling
   // watchman: true,
+
+  // disable auto-injecting of globals like `expect`, `describe`, `test`, `it`, ...
+  // they are to be imported manually
+  injectGlobals: false
 }