Log Message:
Update to FriCAS 1.0.9

Notable changes (compared to version 1.0.8) include:

- Speed improvements to polynomial multiplication, power series
  multiplication, guessing package and coercion of polynomials
  to expressions.
- Domains for tensor products.
- 'Complex(Integer)' is now  UniqueFactorizationDomain.
- Types in interpreter are now of type 'Type' (instead of 'Domain')
  and categories in interpreter are of type 'Category' (instead of
  'Subdomain(Domain)').
- Interpreter functions can now return 'Type'.
- New function for files: 'flush'.
- Spad compiler: return in nested functions and nested functions
  returning functions.

Bug fixes, in particular:

- Several fixes to guessing package.
- Avoid crash when unparsing equations.
- Equation solver accepts more solutions.
- Fixed handling of 'Tuple' in Spad parser.
- Fixed miscompilation of record constructor by Spad compiler.