Merge pull request #672 from valory-xyz/feat/source-repo-validation

Fix repository source regex

aea/package_manager/base.py

@@ -50,7 +50,7 @@
     IS_IPFS_PLUGIN_INSTALLED = False
 
 PACKAGES_FILE = "packages.json"
-PACKAGE_SOURCE_RE = re.compile(r"([a-z-_0-9]+\/[a-z-_0-9]+)((:)([a-z\.0-9_-]+))?")
+PACKAGE_SOURCE_RE = re.compile(r"([a-z-_0-9A-Z]+\/[a-z-_0-9A-Z]+)((:)([a-z\.0-9_-]+))?")
 
 PackageIdToHashMapping = OrderedDictType[PackageId, str]
 ConfigLoaderCallableType = Callable[[PackageType, Path], PackageConfiguration]