feat: support negative globs (#1324)

Co-authored-by: Andrey Nering <andrey@nering.com.br>

docs/static/schema.json

@@ -88,14 +88,14 @@
             "description": "A list of sources to check before running this task. Relevant for `checksum` and `timestamp` methods. Can be file paths or star globs.",
             "type": "array",
             "items": {
-              "type": "string"
+              "$ref": "#/definitions/3/glob"
             }
           },
           "generates": {
             "description": "A list of files meant to be generated by this task. Relevant for `timestamp` method. Can be file paths or star globs.",
             "type": "array",
             "items": {
-              "type": "string"
+              "$ref": "#/definitions/3/glob"
             }
           },
           "status": {
@@ -446,6 +446,25 @@
           }
         }
       },
+      "glob": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "$ref": "#/definitions/3/glob_obj"
+          }
+        ]
+      },
+      "glob_obj": {
+        "type": "object",
+        "properties": {
+          "exclude": {
+            "description": "File or glob patter to exclude from the list",
+            "type": "string"
+          }
+        }
+      },
       "run": {
         "type": "string",
         "enum": ["always", "once", "when_changed"]