flex: modernize
flex: add test

Closes #35328.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
postgis 2.1.5

Version bump.

Closes #35329.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
bison: modernize
bison: add test

Closes #35330.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
asciidoc: modernize
asciidoc: add test

Closes #35331.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
test-bot: clean up harder on failure (before).
test-bot: init added/modified formulae arrays.
aspell: modernize
aspell: add test

Closes #35332.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
aspell: add 0.60.6.1 bottle.
libspatialite: update 4.2.0 bottle.