bump version to 1.1.0, centralize VERSION constant

tests/test_api.py

@@ -2,6 +2,8 @@
 
 import json
 
+from app.config import VERSION
+
 
 class TestIndex:
     """Tests for GET / endpoint."""
@@ -12,7 +14,7 @@ class TestIndex:
         assert response.status_code == 200
         data = json.loads(response.data)
         assert data["name"] == "FlaskPaste"
-        assert data["version"] == "1.0.0"
+        assert data["version"] == VERSION
         assert "endpoints" in data
         assert "usage" in data