Prolog-env

sync bugfix to inference.py
**Full Changelog**: https://github.com/NewJerseyStyle/prolog-env/compare/v0.1.3...v0.1.4

**Full Changelog**: https://github.com/NewJerseyStyle/prolog-env/compare/v0.1.2...v0.1.3

**Changelog:**
* Added tools in `transformers` compatible format

**Full Changelog**: https://github.com/NewJerseyStyle/prolog-env/compare/v0.1.1...v0.1.2

**Full Changelog**: https://github.com/NewJerseyStyle/prolog-env/compare/v0.0.2...v0.1.1

**Changes:**
* Added check for test cases when it is provided ensure it begin with `:- begin_test` statement and end with `:- end_test` statement

**Full Changelog**: https://github.com/NewJerseyStyle/prolog-env/compare/v0.0.1...v0.0.2

**Features:**
* OpenAI GYM compatible class
* Execute Prolog program and reward if it runs without error
* Allow test cases passed and tested against the code provided

**Full Changelog**: https://github.com/NewJerseyStyle/prolog-env/commits/v0.0.1