Add moar tests

[0x64746b]

• Test parsing of COMPOSED_ELEMENTs containing a
  • SIMPLE_ELEMENT
    • fixed in 06792c0
• Test parsing of SIMPLE_ELEMENTs containing a
  • STR_VALUE
    • fixed in f2d49a4
  • INT_VALUE
    • fixed in f2d49a4
  • TIMESTAMP
    • fixed in f2d49a4
  • DIVISION
    • fixed in 74f0701
• Test parsing of date_time elements:
  • TIMESTAMPs
    • fixed in c601b4c
  • COMPOSED_DATEs
    • fixed in ae35733
  • TIMEZONEs
    • fixed in c601b4c
  • COMPOSED_TIMEs
    • fixed in e5f3e80
  • DATETIMEs
    • fixed in 0fafb76
  • Negative tests
    • Changed order of SIMPLE_VALUEs in
      • DATETIMEs
      • COMPOSED_DATEs
      • COMPOSED_TIMEs