v0.4.2

adds:

• analysis::pe::get_functions that returns local functions, thunks, and imports
• analysis::pe::runtime_functions that parse x64 exception data in .pdata section
• more x64 function prologue patterns
• detection (and removal of) thunks from functions list

lancelot vs SoK test suite
  functions:
    precision: 0.871
    recall:    0.850
  basic blocks:
    precision: 0.987
    recall:    0.885
  instructions:
    precision: 0.995
    recall:    0.903

worst performing function recall:
--------  ------------------------------------
0.540136  SoK-windows-testsuite/cl_O2/tee
0.540136  SoK-windows-testsuite/cl_Ox/tee
0.5403    SoK-windows-testsuite/cl_O1/tee
0.5403    SoK-windows-testsuite/cl_Od/tee
0.544627  SoK-windows-testsuite/cl_O2/xxd
0.544627  SoK-windows-testsuite/cl_Ox/xxd
0.545105  SoK-windows-testsuite/cl_O1/xxd
--------  ------------------------------------

worst performing function precision:
--------  ---------------------------------------
0.454656  SoK-windows-testsuite/cl_Ox/libxml2
0.456754  SoK-windows-testsuite/cl_O2/libxml2
0.517874  SoK-windows-testsuite/cl_O2/tiffcrop
0.520982  SoK-windows-testsuite/cl_O2/vim
0.522531  SoK-windows-testsuite/cl_Ox/tiffcrop
0.541377  SoK-windows-testsuite/cl_Ox/vim