This release:

• adds single-core builds on the RP2040 and RP2350 to enable executing arbitrary code on the second core alongside zeptoforth on the first core; note that only the kernel binaries are included in the release tarball, and if the user desires to use these builds in practice they will need to build the remainder themselves.
• adds the ability to postpone numeric literals.
• adds ]] ... [[ to eliminate explicit calls to postpone (note that local variables cannot be used here).
• adds cycles::cycle-counter to give a cycle count on non-ARM Cortex-M0+ platforms (i.e. non-RP2040 platforms); note that cycles::init-cycles must be called beforehand to start cycle counting and initialize the cycle count to zero.