Log Message:
Update to 0.3.1:

libwps-0.3.1

- Fix parsing of floating-point numbers in specific cases.
- Fix several minor issues reported by Coverity and Clang.
- Check arguments of public functions. Passing NULL no longer causes
  a crash.
- Use symbol visibility on Linux. The library only exports the public
  functions now.
- Import @TERM and @CTERM functions (fdo#86241).
- Handle LICS character encoding in spreadsheets (fdo#87222).
- Fix a crash when reading a broken file, found with the help of
  american-fuzzy-lop.