fix(lib): bump Manim and fix OpenGL renderer (#522)

* fix(lib): bump Manim and fix OpenGL renderer

* fix(tests): correctly change cwd

tests/test_slide.py

@@ -4,7 +4,6 @@ import random
 import shutil
 import sys
 import tempfile
-import threading
 from collections.abc import Iterator
 from pathlib import Path
 from typing import Any, Union
@@ -71,7 +70,9 @@ Slide = Union[CESlide, _GLSlide, CEGLSlide]
                 reason="See https://github.com/3b1b/manim/issues/2263.",
             ),
         ),
+        "--CE --renderer=opengl",
     ],
+    ids=("CE", "GL", "CE(GL)"),
 )
 def test_render_basic_slide(
     renderer: str,
@@ -84,7 +85,7 @@ def test_render_basic_slide(
     with runner.isolated_filesystem() as tmp_dir:
         shutil.copy(manimgl_config, tmp_dir)
         results = runner.invoke(
-            render, [renderer, str(slides_file), "BasicSlide", "-ql"]
+            render, [*renderer.split(" "), str(slides_file), "BasicSlide", "-ql"]
         )
 
         assert results.exit_code == 0, results
@@ -235,21 +236,17 @@ def assert_constructs(cls: SlideType) -> None:
     init_slide(cls).construct()
 
 
-_L = (
-    threading.Lock()
-)  # We cannot change directory multiple times at once (in the same thread)
-
-
 @contextlib.contextmanager
 def tmp_cwd() -> Iterator[str]:
-    old_cwd = os.getcwd()
+    cwd = os.getcwd()
+    tmp_dir = tempfile.mkdtemp()
 
-    with tempfile.TemporaryDirectory() as tmp_dir, _L:
-        try:
-            os.chdir(tmp_dir)
-            yield tmp_dir
-        finally:
-            os.chdir(old_cwd)
+    os.chdir(tmp_dir)
+
+    try:
+        yield tmp_dir
+    finally:
+        os.chdir(cwd)
 
 
 def assert_renders(cls: SlideType) -> None: