Do not ignore header files in C bindings

Author: jonatanklosko

.gitignore

@@ -18,7 +18,6 @@ Cargo.lock
 /*.dylib
 /*.so*
 *.o
-/bindings/c/*.h
 /bindings/c/tree-sitter-*.pc
 
 # Files generated by Swift

bindings/c/tree-sitter-elixir.h

@@ -0,0 +1,16 @@
+#ifndef TREE_SITTER_ELIXIR_H_
+#define TREE_SITTER_ELIXIR_H_
+
+typedef struct TSLanguage TSLanguage;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const TSLanguage *tree_sitter_elixir(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // TREE_SITTER_ELIXIR_H_