Mocks in the unit test suite do not work when you use more than one method in the same test.

[jhomarolo]

Describe the bug
Mocks in the unit test suite do not work when you use more than one method in the same test.
Example: If you want to test in a method the limit with orderBy or where with offset, won't work.

To Reproduce
Steps to reproduce the behavior:

1. Go to find suite test, and let's check the should return entities with column order by method:

   herbs2knex/test/queries/find.js

   Line 81 in c2ed159

   it('should return entities with collumn order by', async () => {

2. If you add a limit clause into this method, like this:

//when
const ret = await itemRepo.find({ limit: 1,  orderBy: 'stringTest' })

3. Then the test will break showing about the query.orderBy is not a function

Expected behavior
I expect that multiple causes in the test runner cases work's fine together

Additional context
I believe that the problem is because how the methods works overriding the knex(mock) instance to join multiple conditions in the same query.

    if (options.limit > 0) query = query.limit(options.limit)
    if (options.offset > 0) query = query.offset(options.offset)

See the find method in the image:

When the query var, receives a new query instance, the order methods that was inside the knex instance, no longer exists