Use OSError instead of alias IOError

https://docs.astral.sh/ruff/rules/os-error-alias/

Signed-off-by: Alfred Wingate <parona@protonmail.com>

src/euscan/handlers/cpan.py

@@ -128,7 +128,7 @@ def scan_pkg(pkg, options):
         fp = helpers.urlopen(url)
     except urllib.error.URLError:
         return []
-    except IOError:
+    except OSError:
         return []
 
     if not fp:

src/euscan/handlers/generic.py

@@ -112,7 +112,7 @@ def scan_directory_recursive(cp, ver, rev, url, steps, orig_url, options):
         fp = helpers.urlopen(url)
     except urllib.error.URLError:
         return []
-    except IOError:
+    except OSError:
         return []
 
     if not fp:

src/euscan/handlers/php.py

@@ -50,7 +50,7 @@ def scan_pkg(pkg, options):
         fp = helpers.urlopen(url)
     except urllib.error.URLError:
         return []
-    except IOError:
+    except OSError:
         return []
 
     if not fp:

src/euscan/handlers/rubygems.py

@@ -58,7 +58,7 @@ def scan_pkg(pkg, options):
         fp = helpers.urlopen(url)
     except urllib.error.URLError:
         return []
-    except IOError:
+    except OSError:
         return []
 
     if not fp:

src/euscan/handlers/url.py

@@ -45,7 +45,7 @@ def handle_directory_patterns(base, file_pattern):
         fp = helpers.urlopen(basedir)
     except urllib.error.URLError:
         return []
-    except IOError:
+    except OSError:
         return []
 
     if not fp:

src/euscan/helpers.py

@@ -280,7 +280,7 @@ def urlallowed(url):
         try:
             rp.read()
             rpcache[baseurl] = rp
-        except IOError:
+        except OSError:
             rp = None
 
         setdefaulttimeout(timeout)
@@ -370,7 +370,7 @@ def tryurl(fileurl, template):
 
     except urllib.error.URLError:
         result = None
-    except IOError:
+    except OSError:
         result = None
 
     euscan.output.eend(errno.ENOENT if not result else 0)