Update supported pip to 26.0

Author: frenzymadness

micropipenv.py

@@ -49,7 +49,7 @@
 from urllib.parse import urlparse
 
 _LOGGER = logging.getLogger(__title__)
-_SUPPORTED_PIP_STR = ">=9,<=25.3"  # Respects requirement in setup.py and latest pip to release date.
+_SUPPORTED_PIP_STR = ">=9,<=26.0"  # Respects requirement in setup.py and latest pip to release date.
 
 try:
     from pip import __version__ as pip_version