the_silver_searcher 0.21.0
the_silver_searcher: add 0.21.0 bottle.

Closes #27809.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
cspice 64: new formula

JPL SPICE Toolkit for C
updating cspice.rb with recommendations

Using explicit arguments instead of wildcards
cspice: add 64 bottle.