feat(scanner): use alloc header

src/scanner.c

@@ -1,13 +1,10 @@
+#include "tree_sitter/alloc.h"
 #include "tree_sitter/parser.h"
 
 #include <assert.h>
 #include <string.h>
 #include <wctype.h>
 
-#if __STDC_VERSION__ < 201112L
-#define static_assert(cnd, msg) assert(cnd && msg)
-#endif // __STDC_VERSION__ < 201112L
-
 enum TokenType { RAW_STRING_DELIMITER, RAW_STRING_CONTENT };
 
 /// The spec limits delimiters to 16 chars
@@ -98,7 +95,7 @@ static bool scan_raw_string_content(Scanner *scanner, TSLexer *lexer) {
 }
 
 void *tree_sitter_cpp_external_scanner_create() {
-    Scanner *scanner = (Scanner *)calloc(1, sizeof(Scanner));
+    Scanner *scanner = (Scanner *)ts_calloc(1, sizeof(Scanner));
     memset(scanner, 0, sizeof(Scanner));
     return scanner;
 }
@@ -145,5 +142,5 @@ void tree_sitter_cpp_external_scanner_deserialize(void *payload, const char *buf
 
 void tree_sitter_cpp_external_scanner_destroy(void *payload) {
     Scanner *scanner = (Scanner *)payload;
-    free(scanner);
+    ts_free(scanner);
 }