Bump the bundled pyrefly to 1.2.0 (#2021)

pyrefly 1.1.1 advertises workspace/willRenameFiles but answers it with null; 1.2.0 answers with the import edits (measured on the Python test repo). Needed by the file-rename support that follows.

CHANGELOG.md

@@ -126,6 +126,9 @@ Status of the `main` branch. Changes prior to the next official version change w
     version changed
   - Fix: A language server's cache directory was determined by the language_id rather than 
     the language server identifier's key. The two identifiers coincided in most cases.
+  - Bump the bundled pyrefly to 1.2.0: 1.1.1 advertises `workspace/willRenameFiles` but answers it with `null`;
+    1.2.0 answers with the import edits (measured on the Python test repo: the two absolute importers of a
+    renamed module; a relative import of it, `from .models import`, is not rewritten by either)
   - Fix: TypeScript and VTS now disable automatic type acquisition as intended, while VTS
     preserves explicit user settings across initialization and configuration requests (#1989)
     VTS initialization options now override defaults per top-level key rather than replacing the

src/solidlsp/language_servers/pyrefly_server.py

@@ -30,7 +30,7 @@ from solidlsp.settings import SolidLSPSettings
 
 log = logging.getLogger(__name__)
 
-PYREFLY_VERSION = "1.1.1"
+PYREFLY_VERSION = "1.2.0"
 PYREFLY_CONFIG_DOC_URL = "https://pyrefly.org/en/docs/configuration/"
 
 # Pyrefly cancels in-flight requests with these error codes whenever its workspace state mutates