Fix bug when importing packages in the same directory of a file, but this isn't the root directory of the project

[meevee98]

Summary or solution description
The compiler would allow user module importing only if imported from the root module.
Changed to accept imports relative to the importer file folder as well.

How to Reproduce

neo3-boa/boa3_test/test_sc/import_test/FromImportUserModuleFromRootAndFileDir.py

Lines 4 to 17 in 5d91d7d

	from boa3_test.test_sc.import_test.FromImportTyping import EmptyList as RootImportedFunction
	from package_with_import.Module import EmptyList as FileDirImportedFunction
	@public
	def call_imported_from_root() -> list:
	a: List[Any] = RootImportedFunction()
	return a
	@public
	def call_imported_from_file_dir() -> list:
	a: List[Any] = FileDirImportedFunction()
	return a

Tests

neo3-boa/boa3_test/tests/compiler_tests/test_import.py

Lines 354 to 373 in 5d91d7d

	def test_from_import_user_module_from_root_and_file_directories(self):
	path = self.get_contract_path('FromImportUserModuleFromRootAndFileDir.py')
	self.compile_and_save(path, root_folder=self.get_dir_path(self.test_root_dir))
	path, _ = self.get_deploy_file_paths(path)
	runner = NeoTestRunner()
	invokes = []
	expected_results = []
	invokes.append(runner.call_contract(path, 'call_imported_from_root'))
	expected_results.append([])
	invokes.append(runner.call_contract(path, 'call_imported_from_file_dir'))
	expected_results.append([])
	runner.execute()
	self.assertEqual(VMState.HALT, runner.vm_state, msg=runner.error)
	for x in range(len(invokes)):
	self.assertEqual(expected_results[x], invokes[x].result)

Platform:

• OS: Windows 10 x64
• Python version: Python 3.7+

[lllwvlvwlll]

Task linked: CU-864e946ub Fix bug when importing packages in the same directory of a file, but this isn't the root directory of the project

[coveralls]

Coverage: 90.941% (-0.05%) from 90.992% when pulling 5d91d7d on CU-864e946ub into ab71cd5 on development.