refactor: line and column pass in original_location_for start from 1

Author: Brooooooklyn

README.md

@@ -26,5 +26,6 @@ A tiny [source-map-mappings](https://github.com/fitzgen/source-map-mappings) bin
 from py_sourcemap import SourcemapParser
 
 sourcemap_parser = SourcemapParser("./tests/index.js.map")
-sourcemap_parser.original_location_for(0, 195302) # (original_line, original_column, source_file_name, function_name_in_source)
+# pass line, column in, start from 1
+sourcemap_parser.original_location_for(1, 195303) # (original_line, original_column, source_file_name, function_name_in_source) start from 1
 ```

src/lib.rs

@@ -57,7 +57,7 @@ impl SourcemapParser {
     if let Some(Mapping { original, .. }) =
       self
         .parsed_map
-        .original_location_for(generated_line, generated_column, Bias::LeastUpperBound)
+        .original_location_for(generated_line - 1, generated_column - 1, Bias::LeastUpperBound)
     {
       match original {
         Some(location) => {

tests/test_parse.py

@@ -8,7 +8,7 @@ def setUp(self):
         self.sourcemap = SourcemapParser("./tests/index.js.map")
 
     def test_parse_trace(self):
-        result = self.sourcemap.original_location_for(0, 195302)
+        result = self.sourcemap.original_location_for(1, 195303)
         self.assertEqual(result[0], 22)
         self.assertEqual(result[1], 41)
         self.assertEqual(result[2][-13:], 'TopicList.jsx')