test: Remove erroneous warning diagnostic

The module value in tsconfig is like `esnext` and erroneously triggers a diagnostic warning, as
shown in this issue: kulshekhar/ts-jest#748

jest.config.js

@@ -1,3 +1,13 @@
+// Module value in tsconfig is like `esnext` and erroneously triggers a diagnostic warning
+// https://github.com/kulshekhar/ts-jest/issues/748
+const tsJestIgnore = {
+  'ts-jest': {
+    diagnostics: {
+      ignoreCodes: [151001],
+    },
+  },
+}
+
 module.exports = {
   roots: [
     '<rootDir>/src'
@@ -7,4 +17,7 @@ module.exports = {
   },
   testRegex: '(/__tests__/.*|(\\.|/)test)\\.ts?$',
   moduleFileExtensions: ['ts', 'js'],
+  globals: {
+    ...tsJestIgnore,
+  },
 }