ucode: update to latest Git HEAD

ucode: update to latest Git HEAD

929c862 vm: fix toplevel function call protocol
8f34d70 fs: fix chown() and rename() error return values
03ca445 tests: disable fuzz tests for now
3b1be3d types: mark further GC roots
d49af4e types: fix comparison of differently signed integers
c79ff39 types: handle conversion errors when dealing with negative error indexes
3315b1f types: allow negative array indexes
d5b25f9 treewide: harmonize function naming
cc4ce8d module: remove unused defines
f5d7526 examples: add libucode usage examples
559eff2 types, vm: adjust GC api
e5e7e62 treewide: move header files into dedicated directory
ff6168a build: install header files
7e6ce0f main: introduce new flag `-x` to allow disabling specific functions
b1817b3 vm: fix invalid memory access on GC'ing uninitialized VM context
498fe87 main: refactor option parsing and VM setup
ff52440 treewide: consolidate typedef naming
1d60418 vm: add API to control trace mode
48f33ad vm: make root exception handler configurable
0f69f09 vm: fix invalid memory access on toplevel function calls
6bcc318 vm: fix handling exceptions in top-level function calls
4ae0568 lib, vm: reimplement exit() as exception type
2f77657 vm: extend API to allow returning result value from VM execution
111645a vm: remove module preloading logic
38ff6de main: preload modules ourselves
d5bc223 vm: add uc_vm_invoke() helper
ef0baf1 vm: cosmetic fix for outputting exceptions without source context
b11a2fa vm: move global scope allocation into uc_vm_init()
900b2a3 vm: add getter and setter for vm globals scope
0179576 lib: rename uc_add_proto_functions() to uc_add_functions()
98b9c84 lib: expose stdlib function array
1adfba0 treewide: eliminate dead code and unused functions
3974e71 treewide: replace a number of unnecessary type casts
bf85226 treewide: move ressource type registry into vm instance
e2b3d2e build: split into libucode and ucode cli
dad8f3a types: properly deal with circular data in GC mark phase
62dbd64 lexer: rename UT_ prefixed constants to UC_
bc8e465 types: fix wrong assert() on tearing down object trees
853b9f1 vm: fix potential invalid memory access in uc_vm_get_error_context()
6f05cdd lib: fix refcount imbalance in uc_require_path()
96f140b lib, vm: ensure that require() compiles modules only once
df5db5f compiler: don't segfault on invalid declaration expressions
a97c7a1 lexer: transition into EOF state on unrecognized character
2a838d1 compiler: improve mapping of binary operator tokens to instructions
9872f65 vm: add support for I_LE and I_GE instructions
4e410c3 treewide: let uc_cmp() use instruction instead of token numbers
ce6081d lexer, vm: reorder token and instruction numbers
234a4f6 lib: implement b64enc() and b64dec() functions
856a0c0 lib: only consider context of calling function for callbacks
86fb130 lib: implement min() and max() functions
3e893e6 lib: pass-through "this" context to library function callbacks
42de7ab lib: implement `sourcepath()` function
05c80a7 lib: fix negative uc_index() return value on 32bit systems
9874562 lexer: implement raw code mode
3b665c8 lexer: drop value union from keyword table
44354cf lexer, compiler: separate TK_BOOL token into TK_TRUE and TK_FALSE tokens
5879bdf syntax: drop Infinity and NaN keywords
d4edadc lib: rename uc_lib_init() to uc_load_stdlib()
d81bad7 main, lib: move allocation of globals object into lib function
c4f4b38 main: simplify REQUIRE_SEARCH_PATH initialization
54ca3aa types: fix uninitialized memory on setting non-contiguous array indexes
cbc0d78 build: let require search patch default to CMAKE_INSTALL_PREFIX
5714705 syntax: introduce `const` support
ed32c42 compiler, lexer: add NO_LEGACY define to disable legacy syntax features
ff6811f syntax: implement `delete` as proper operator
5803d86 lib: implement wildcard() function
dfb7379 fs: implement chmod(), chown(), rename() and glob() functions
1ddf5b6 lexer: skip interpreter line in any source buffer
9951a00 build: lower minimum required CMake version to v3.13
7b81ab2 main: expose argv as global ARGV array to ucode scripts
7283a70 tests: rename misnamed testcases for consistency
3f80116 compiler: fix local for-loop initializer variable declarations
f20b56f compiler: properly parse slashes in parenthesized division expressions
5c4e1ea lib: implement regexp(), a function to construct regexp instances at runtime
e546bba lib: implement render(), an include variant capturing output in a string
0cb10c6 vm: implement mechanism to change output file descriptor
eb8a64d lib: fix uc_sort()
f1ffc9f vm: truncate long values after 60 chars in trace output
850612f compiler: properly handle break/continue in nested scopes
f0a9875 compiler: properly handle keyword in parenthesized property access expression
1660433 compiler: fix stack mismatch on compiling `use strict` statements
a36e0df syntax: implement support for 'use strict' pragma
827a34a vm, compiler: get rid of unused struct members
594cdf3 lib: implement assert()
c4d1648 lib: add support for pretty printing JSON to printf() and sprintf()
f2eaea3 lib: gracefully handle truncated format strings in uc_printf_common()
02629b8 lexer: fix infinite loop on parsing unterminated comments
2bc9bac lexer: fix infinite loop on parsing unterminated expression blocks
f73e201 lexer: fix infinite loop when parsing regexp literal at EOF
86b4863 compiler: fix segfault on parsing invalid pre/post increment expressions
0e24509 lib: fix reporting source context lines at EOF
e66b2ad compiler, lexer: improve lexical state handling
e29b574 lib: fix uc_split() quirks
64eec7f treewide: ISO C / pedantic compliance
4af803d build: output error messages on test failures
9ef693e vm: improve context for early errors
6def9fc tests: pass ucode library path through environment
d5dd183 treewide: address various sign-compare warnings
28825ac types: support creating ressource values without associated type
9c5106a types: fix potential memory leaks and null pointer accesses
c51934a types: fix potential leak of key in ucv_object_add()
7b28727 main: fix ineffective EOF check in parse()
4cf897c lib: uc_system(): fix invalid free() of non-heap memory
35af4ba treewide: rework internal data type system
f2c4b79 treewide: fix issues reported by clang code analyzer
93ededb tests: allow executing run_tests.sh from any directory
0e4a387 Add initial GitLab and GitHub CI support
df73b25 tests: add more tests
41d33d0 tests: custom: return exit code if tests fails
1c548a6 cmake: do not output binaries into lib directory
2b59097 tests: create custom tests from current tests cases
8039361 main: provide just binary name in help output
778e4f7 lexer: fix incomplete struct initializers
502ecdc cmake: enable extra compiler checks
3c2aeff cmake: fix includes and libraries
617a114 cmake: make 3.0 minimum version
f360350 lib: implement sleep(ms) function
7f0ff91 lib: allow parsing non-array, non-object value in json()

Signed-off-by: Jo-Philipp Wich <jo@mein.io>