Pin httpx at 0.19.0 due to deezer/spleeter#808 (#949)

Author: microtherion

.github/dependabot.yml

@@ -26,6 +26,7 @@ updates:
       - dependency-name: "librosa"            # Spleeter dependencies
       - dependency-name: "numba"              # Spleeter dependencies
       - dependency-name: "llvmlite"           # Spleeter dependencies
+      - dependency-name: "httpx"              # due to https://github.com/deezer/spleeter/pull/808
 
   - package-ecosystem: "npm"
     directory: "/frontend"

requirements.txt

@@ -35,7 +35,8 @@ python-magic==0.4.27; sys_platform == 'linux'
 python-magic-bin==0.4.14; sys_platform != 'linux'
 # Spleeter dependencies
 ffmpeg-python==0.2.0
-httpx==0.26.0
+# Do NOT upgrade to 0.20.0 or later until https://github.com/deezer/spleeter/pull/808 is fixed
+httpx==0.19.0
 librosa==0.8.1
 # Override Spleeter's hard llvmlite dependency
 llvmlite==0.39.0