trim leading and trailing slashes from parseRepoUrl query parameters

Signed-off-by: Matt Benson <gudnabrsam@gmail.com>

plugins/scaffolder-node/package.json

@@ -66,6 +66,7 @@
     "globby": "^11.0.0",
     "isomorphic-git": "^1.23.0",
     "jsonschema": "^1.5.0",
+    "lodash": "^4.17.21",
     "p-limit": "^3.1.0",
     "tar": "^6.1.12",
     "winston": "^3.2.1",
@@ -76,6 +77,7 @@
   "devDependencies": {
     "@backstage/backend-test-utils": "workspace:^",
     "@backstage/cli": "workspace:^",
-    "@backstage/config": "workspace:^"
+    "@backstage/config": "workspace:^",
+    "@types/lodash": "^4.14.151"
   }
 }