Name already in use

See:
- <#1037>
- <#1038>

…o local var.

…tXmlJsonml

…an string, and add version string to python module

…h 0.18.0.

…ack in the test

… the Go builtin implementation

This reverts commit 56a8038.

This reverts commit f3ab8a7.

… should never happen"

This reverts commit 9ba22f7.

I was confused by this for a minute until I realized it meant .foo and not some magic member.

Please correct me if I'm wrong though 😄

…never happen

python/_jsonnet.c:150:19: warning: comparison of integers of different signs: 'int' and 'const size_t' (aka 'const unsigned long') [-Wsign-compare]
    for (i = 0; i < ctx->argc; ++i) {
                ~ ^ ~~~~~~~~~

Change type of index loop (i) to Py_ssize_t like in all other places in the code.
Cast ctx->argc to Py_ssize_t to make them the same type

Useful link https://www.python.org/dev/peps/pep-0353

vm.cpp:1585:19: warning: enumeration value 'binary' not handled in switch [-Wswitch]
        switch (v.type()) {
                  ^

Show explicitly it's not just forgotten to handle the json::value_t::binary case

Add `importbin`.  Like `importstr` but returns an array of
numbers (integers 0-255).

Note! This changes the `JsonnetImportCallback` function type
signature, and requires modification to existing code that uses custom
import callbacks.  The included python bindings have been updated.

See https://gcc.gnu.org/gcc-13/porting_to.html#header-dep-changes.

This fixes Gentoo bug https://bugs.gentoo.org/875569.

This is more POSIX compliant, handy for MacOS users.

Added with !899