gap-browse-1.8.21-bp160.1.9

- Remove BIBL
- Switch to ncurses6

- Make specfile conform to POSIX sh

- Update BuildRequires to ncurses-devel

- Update to release 1.8.21
  * Fixed another problem when running the tests in 'tst/tests.tst'
    in the background.
  * Support the package extensions feature of GAP 4.13

- Update to release 1.8.20
  * Added the new application "BrowseWizard".

- Update to release 1.8.19
  * Use `IsKernelExtensionAvailable` and `LoadKernelExtension`
    instead of 'LOAD_DYN'.

- Update to release 1.8.18
  * Browse does no longer assume that
    'GAPInfo.SystemEnvironment.TERM' is available, in particular
    Browse does not try to set this component.
  * Drop the support for the '.zoo' archive format.
  * Support JSON format for files that belong to database
    attributes, document 'DatabaseAttributeString' and related
    functions.
  * Make Browse more robust when called with bad setting of the
    TERM environment variable, in particular it should now no
    longer crash GAP during initialization.
  * Support columns of orthogonal discriminants (OD) and character
    field degrees (d) in 'Browse' for character tables.

- Update to new upstream release 1.8.8
  * Blocks in demo files can now be separated by lines starting
    with #% which makes testing demo files easier.
  * Fixed a bug in the 'Browse' method for character tables: The
    shown centralizer orders and power map information were not
    correct when a set of characters or class positions was
    prescribed.
  * Fixed a bug in 'BrowseConwayPolynomials': In the displayed
    polynomials, the exponents of those monomials whose
    coefficient is different from 1 were erroneously increased
    by 1.