We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Update Starlette dependency to 0.19
Starlette 0.19 has been released, we should bump Ariadne's version to it before releasing 0.15 

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `setup.py`
Content:
```
1 #! /usr/bin/env python
2 import os
3 from setuptools import setup
4 
5 CLASSIFIERS = [
6     "Development Status :: 4 - Beta",
7     "Intended Audience :: Developers",
8     "License :: OSI Approved :: BSD License",
9     "Operating System :: OS Independent",
10     "Programming Language :: Python",
11     "Programming Language :: Python :: 3.7",
12     "Programming Language :: Python :: 3.8",
13     "Programming Language :: Python :: 3.9",
14     "Programming Language :: Python :: 3.10",
15     "Topic :: Software Development :: Libraries :: Python Modules",
16 ]
17 
18 README_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), "README.md")
19 with open(README_PATH, "r", encoding="utf8") as f:
20     README = f.read()
21 
22 setup(
23     name="ariadne",
24     author="Mirumee Software",
25     author_email="hello@mirumee.com",
26     description="Ariadne is a Python library for implementing GraphQL servers.",
27     long_description=README,
28     long_description_content_type="text/markdown",
29     license="BSD",
30     version="0.15.0.dev5",
31     url="https://github.com/mirumee/ariadne",
32     packages=["ariadne"],
33     include_package_data=True,
34     install_requires=[
35         "graphql-core>=3.2.0,<3.3",
36         "starlette<0.19",
37         "typing_extensions>=3.6.0",
38     ],
39     extras_require={"asgi-file-uploads": ["python-multipart>=0.0.5"]},
40     classifiers=CLASSIFIERS,
41     platforms=["any"],
42     zip_safe=False,
43 )
44
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -33,7 +33,7 @@
     include_package_data=True,
     install_requires=[
         "graphql-core>=3.2.0,<3.3",
-        "starlette<0.19",
+        "starlette>0.17<0.20",
         "typing_extensions>=3.6.0",
     ],
     extras_require={"asgi-file-uploads": ["python-multipart>=0.0.5"]},

{"golden_diff": "diff --git a/setup.py b/setup.py\n--- a/setup.py\n+++ b/setup.py\n@@ -33,7 +33,7 @@\n     include_package_data=True,\n     install_requires=[\n         \"graphql-core>=3.2.0,<3.3\",\n-        \"starlette<0.19\",\n+        \"starlette>0.17<0.20\",\n         \"typing_extensions>=3.6.0\",\n     ],\n     extras_require={\"asgi-file-uploads\": [\"python-multipart>=0.0.5\"]},\n", "issue": "Update Starlette dependency to 0.19\nStarlette 0.19 has been released, we should bump Ariadne's version to it before releasing 0.15 \n", "before_files": [{"content": "#! /usr/bin/env python\nimport os\nfrom setuptools import setup\n\nCLASSIFIERS = [\n    \"Development Status :: 4 - Beta\",\n    \"Intended Audience :: Developers\",\n    \"License :: OSI Approved :: BSD License\",\n    \"Operating System :: OS Independent\",\n    \"Programming Language :: Python\",\n    \"Programming Language :: Python :: 3.7\",\n    \"Programming Language :: Python :: 3.8\",\n    \"Programming Language :: Python :: 3.9\",\n    \"Programming Language :: Python :: 3.10\",\n    \"Topic :: Software Development :: Libraries :: Python Modules\",\n]\n\nREADME_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), \"README.md\")\nwith open(README_PATH, \"r\", encoding=\"utf8\") as f:\n    README = f.read()\n\nsetup(\n    name=\"ariadne\",\n    author=\"Mirumee Software\",\n    author_email=\"hello@mirumee.com\",\n    description=\"Ariadne is a Python library for implementing GraphQL servers.\",\n    long_description=README,\n    long_description_content_type=\"text/markdown\",\n    license=\"BSD\",\n    version=\"0.15.0.dev5\",\n    url=\"https://github.com/mirumee/ariadne\",\n    packages=[\"ariadne\"],\n    include_package_data=True,\n    install_requires=[\n        \"graphql-core>=3.2.0,<3.3\",\n        \"starlette<0.19\",\n        \"typing_extensions>=3.6.0\",\n    ],\n    extras_require={\"asgi-file-uploads\": [\"python-multipart>=0.0.5\"]},\n    classifiers=CLASSIFIERS,\n    platforms=[\"any\"],\n    zip_safe=False,\n)\n", "path": "setup.py"}], "after_files": [{"content": "#! /usr/bin/env python\nimport os\nfrom setuptools import setup\n\nCLASSIFIERS = [\n    \"Development Status :: 4 - Beta\",\n    \"Intended Audience :: Developers\",\n    \"License :: OSI Approved :: BSD License\",\n    \"Operating System :: OS Independent\",\n    \"Programming Language :: Python\",\n    \"Programming Language :: Python :: 3.7\",\n    \"Programming Language :: Python :: 3.8\",\n    \"Programming Language :: Python :: 3.9\",\n    \"Programming Language :: Python :: 3.10\",\n    \"Topic :: Software Development :: Libraries :: Python Modules\",\n]\n\nREADME_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), \"README.md\")\nwith open(README_PATH, \"r\", encoding=\"utf8\") as f:\n    README = f.read()\n\nsetup(\n    name=\"ariadne\",\n    author=\"Mirumee Software\",\n    author_email=\"hello@mirumee.com\",\n    description=\"Ariadne is a Python library for implementing GraphQL servers.\",\n    long_description=README,\n    long_description_content_type=\"text/markdown\",\n    license=\"BSD\",\n    version=\"0.15.0.dev5\",\n    url=\"https://github.com/mirumee/ariadne\",\n    packages=[\"ariadne\"],\n    include_package_data=True,\n    install_requires=[\n        \"graphql-core>=3.2.0,<3.3\",\n        \"starlette>0.17<0.20\",\n        \"typing_extensions>=3.6.0\",\n    ],\n    extras_require={\"asgi-file-uploads\": [\"python-multipart>=0.0.5\"]},\n    classifiers=CLASSIFIERS,\n    platforms=[\"any\"],\n    zip_safe=False,\n)\n", "path": "setup.py"}]}