Make methods fluent and also add more methods to class

[mantey-github]

I added some methods to the Tabula Class and also made some of the methods fluent.

• setPdf(string $input): This method accepts the PDF file which needs to be converted. It returns the Tabula class

• setOptions(array $options): This method accepts an array of options. These options are the options required by tabula.
  Options by default are:

[
        'pages' => null,
        'guess' => true,
        'area' => [],
        'relativeArea' => false,
        'lattice' => false,
        'stream' => false,
        'password' => null,
        'silent' => false,
        'columns' => null,
        'format' => null,
        'batch' => null,
        'outfile' => null,
]

• buildOptions(array $options): This now accepts are the options required by tabula in an array form. Now the method is private

• buildJavaOptions(): This method is currently private.

• run(): This method is currently private.

• convert(): This is the final method that has to be called to handle the conversion of the PDF file

[initred]

I'm sorry to see you late about the request.
Currently, the package has not been updated.
Also, thank you fr orequesting this fast-written code for the package that was left unattended.
I've read all the codes and it doesn't seem to be a problem.
We will merge and update that method.
I support you to be a good developer.
Thankyou.

[mantey-github]

I'm sorry to see you late about the request.
Currently, the package has not been updated.
Also, thank you fr orequesting this fast-written code for the package that was left unattended.
I've read all the codes and it doesn't seem to be a problem.
We will merge and update that method.
I support you to be a good developer.
Thankyou.

you're welcome

[mantey-github]

I'm sorry to see you late about the request.
Currently, the package has not been updated.
Also, thank you fr orequesting this fast-written code for the package that was left unattended.
I've read all the codes and it doesn't seem to be a problem.
We will merge and update that method.
I support you to be a good developer.
Thankyou.

I will create a pull request updating the README.md

[initred]

At that time, I had no time, so I wrote all the codes in public. I remember. Haha. LOL. I'll take this into consideration.