make test on fresh clone failes due to undeclared dependencies

# Steps to reproduce

```
git clone https://github.com/caolan/nodeunit.git
cd nodeunit
make test
```

# Expected behaviour

All tests pass

# Actual behaviour

```
nodejs ./bin/nodeunit test
module.js:471
throw err;
^

Error: Cannot find module 'ejs'
at Function.Module._resolveFilename (module.js:469:15)
at Function.Module._load (module.js:417:25)
at Module.require (module.js:497:17)
at require (internal/module.js:20:19)
at Object. (/home/matthew/Documents/Projects/nodeunit/nodeunit/lib/reporters/junit.js:18:11)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
Makefile:148: recipe for target 'test' failed
make: *** [test] Error 1
```

# Commentary

The make script should run `npm install ejs` and `npm install should`, since those are dependencies.

I'm new to nodejs and Make files, so I'm not quite sure how to do this.

Commencez par la cible de test du Makefile autour de la ligne 148 et examinez comment les dépendances sont déclarées ou installées. Reproduisez l’échec avec un clone vierge, tenez compte des dépendances manquantes ejs et should, et vérifiez que make test réussit sans installation manuelle.

Rédigé par le modèle d'indexation à partir du texte de l'issue.