Ignore syntax errors

[isidentical]

For files that contain syntax errors, instead of crashing immediately we should simply ignore it (just like other tools, e.g black).

[nega0]

Not the most robust, but this enough to id misbehaving files, and to work around #20.

diff --git a/teyit.py b/teyit.py
index 60f87ad..d3f84f4 100644
--- a/teyit.py
+++ b/teyit.py
@@ -334,7 +334,11 @@ def _refactor_file(path, **kwargs):
     with tokenize.open(path) as file:
         source = file.read()
         encoding = file.encoding
-    refactored_source, refactors = refactor_until_deterministic(source, **kwargs)
+    try:
+        refactored_source, refactors = refactor_until_deterministic(source, **kwargs)
+    except SyntaxError:
+        print(f"Failed: {path}")
+        return []
     if refactored_source != source:
         path.write_text(refactored_source, encoding=encoding)
     return refactors