fix(hooks): improve defineHooks signature

defineHooks method accepts an array of hooks as 2nd argument or you can pass multiple arguments,

where every argument expects the first one will be treated as an hook

Closes #94

src/Lucid/Model/index.js

@@ -205,11 +205,9 @@ class Model {
    *
    * @public
    */
-  static defineHooks () {
+  static defineHooks (type, hooks) {
     this.$modelHooks = {}
-    const args = _.toArray(arguments)
-    const type = args[0]
-    const hooks = _.tail(args)
+    hooks = _.isArray(hooks) ? hooks : _.tail(arguments)
     _.each(hooks, (hook) => {
       this.addHook(type, hook)
     })

test/unit/lucid.spec.js

@@ -1420,6 +1420,18 @@ describe('Lucid', function () {
       expect(User.$modelHooks['beforeCreate'][1].handler).to.have.property('method')
     })
 
+    it('should be able to define multiple hooks as an array', function () {
+      class User extends Model {}
+      User.bootIfNotBooted()
+      User.defineHooks('beforeCreate', ['Users.validate', 'Users.log'])
+      expect(User.$modelHooks['beforeCreate']).to.be.an('array')
+      expect(User.$modelHooks['beforeCreate'].length).to.equal(2)
+      expect(User.$modelHooks['beforeCreate'][0].handler).to.have.property('instance')
+      expect(User.$modelHooks['beforeCreate'][0].handler).to.have.property('method')
+      expect(User.$modelHooks['beforeCreate'][1].handler).to.have.property('instance')
+      expect(User.$modelHooks['beforeCreate'][1].handler).to.have.property('method')
+    })
+
     it('should override existing hooks when calling defineHooks', function () {
       class User extends Model {}
       User.bootIfNotBooted()