Bump version to 8.1.0436

- 8.1.0426: Accessing invalid memory in SmcOpenConnection(). Reduce size
  of errorstring by one. (Dominique Pelle, closes #3469)
- 8.1.0427: MS-Windows GUI: MS-Windows GUI: using invalid encoded file
  name. Drop the file name and return NULL. (Ken Takata, closes #3467)
- 8.1.0428: The :suspend command is not tested. Add a test. (Dominique
  Pelle, closes #3472)
- 8.1.0429: No test for :lcd with 'shellslash'. Add a test. (Daniel
  Hahler, closes #3475)
- 8.1.0430: Xargadd file left behind after running test. Delete the
  file. (Dominique Pelle)
- 8.1.0431: The qf_jump() function is too long. Refactor to split it
  into several functions. (Yegappan Lakshmanan)
- 8.1.0432: Compiler warning for signed/unsigned. Add type cast. (Mike
  Williams)
- 8.1.0433: Mapping can obtain text from inputsecret(). (Tommy Allen)
  Disallow CTRL-R = and CTRL-\ e when using inputsecret().
- 8.1.0434: copy_loclist() is too long. Split in multiple functions.
  (Yegappan Lakshmanan)
- 8.1.0435: Cursorline highlight not removed in some situation. (Vitaly
  Yashin) Reset last_cursorline when resetting 'cursorline'. (Christian
  Brabandt, closes #3481)
- 8.1.0436: Can get the text of inputsecret() with getcmdline(). (Tommy
  Allen) Don't return the text.