build(swift): include all source files

Package.swift

@@ -14,7 +14,15 @@ let package = Package(
     targets: [
         .target(name: "TreeSitter",
                 path: "lib",
-                sources: ["src/lib.c"],
+                exclude: [
+                        "src/unicode/ICU_SHA",
+                        "src/unicode/README.md",
+                        "src/unicode/LICENSE",
+                        "src/wasm/stdlib-symbols.txt",
+                        "src/lib.c",
+                ],
+                sources: ["src"],
+                publicHeadersPath: "include",
                 cSettings: [
                         .headerSearchPath("src"),
                         .define("_POSIX_C_SOURCE", to: "200112L"),

lib/src/wasm/stdlib.c

@@ -3,6 +3,8 @@
 // as needed, and freeing is mostly a noop. But in the special case of freeing
 // the last-allocated pointer, we'll reuse that pointer again.
 
+#ifdef TREE_SITTER_FEATURE_WASM
+
 #include <stdio.h>
 #include <unistd.h>
 #include <stdlib.h>
@@ -107,3 +109,5 @@ void *realloc(void *ptr, size_t new_size) {
   memcpy(result, &region->data, region->size);
   return result;
 }
+
+#endif

lib/src/wasm/wasm-stdlib.h

@@ -1,3 +1,5 @@
+#ifdef TREE_SITTER_FEATURE_WASM
+
 unsigned char STDLIB_WASM[] = {
   0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x01, 0x1e, 0x06, 0x60,
   0x02, 0x7f, 0x7f, 0x01, 0x7f, 0x60, 0x01, 0x7f, 0x00, 0x60, 0x00, 0x00,
@@ -1308,3 +1310,5 @@ unsigned char STDLIB_WASM[] = {
   0x74
 };
 unsigned int STDLIB_WASM_LEN = 15673;
+
+#endif