[api] adding libpostal_expand_address_root to the public API. This will attempt to delete tokens that can be safely ignored. It's deterministic and rule-based, but is informed by libpostal's fairly comprehensive dictionaries, and should work relatively well across languages for deduping purposes.

src/libpostal.c

@@ -48,6 +48,10 @@ char **libpostal_expand_address(char *input, libpostal_normalize_options_t optio
     return expand_address(input, options, n);
 }
 
+char **libpostal_expand_address_root(char *input, libpostal_normalize_options_t options, size_t *n) {
+    return expand_address_root(input, options, n);
+}
+
 void libpostal_expansion_array_destroy(char **expansions, size_t n) {
     expansion_array_destroy(expansions, n);
 }

src/libpostal.h

@@ -138,6 +138,7 @@ typedef struct libpostal_normalize_options {
 LIBPOSTAL_EXPORT libpostal_normalize_options_t libpostal_get_default_options(void);
 
 LIBPOSTAL_EXPORT char **libpostal_expand_address(char *input, libpostal_normalize_options_t options, size_t *n);
+LIBPOSTAL_EXPORT char **libpostal_expand_address_root(char *input, libpostal_normalize_options_t options, size_t *n);
 
 LIBPOSTAL_EXPORT void libpostal_expansion_array_destroy(char **expansions, size_t n);