Extend `LIST` parsing test

Add another element to list. Check type of parsed value.
Test parsing of composed elements

Check if composed elements can contain lists.
Extend test for parsing composed elements w/ lists

Add a second sub list to the composed element.
Test parsing of nested composed elements
Test parsing of composed elements w/ datetimes
Test parsing composed elements w/ simple elements
Add 3 tests for simple elements

Test parsing of string and int values as well as timestamps.
Add 2 tests for divisions
Merge remote-tracking branch 'origin/master' into feature/add_tests

Conflicts:
	requirements/tests.txt
Merge remote-tracking branch 'origin/master' into feature/add_tests

Conflicts:
	requirements/tests.txt
Refine parsing of the UTC flag in composed date times.

Convert the integer into its boolean value.
Add tests for parsing timestamps and the UTC flag
Test parsing of composed dates
Test parsing of composed times
Test parsing of combined date time elements
Merge pull request #7 from 0x64746b/feature/add_tests

Feature/add tests