Updated `post` method in order to support empty options
Updated `post` method in order to support empty options

| Q             | A
| ------------- | ---
| Branch		| master
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Updated `post` method in order to support empty options

opsway/zohobooks-api