graph: fix manifest parsing of source subgraphs

Author: incrypto32

graph/src/data_source/subgraph.rs

@@ -147,6 +147,7 @@ pub struct UnresolvedDataSource {
 }
 
 #[derive(Clone, Debug, Default, Hash, Eq, PartialEq, Deserialize)]
+#[serde(rename_all = "camelCase")]
 pub struct UnresolvedSource {
     address: DeploymentHash,
     #[serde(default)]

store/test-store/tests/chain/ethereum/manifest.rs

@@ -185,7 +185,7 @@ dataSources:
     network: mainnet
     source: 
       address: 'QmUVaWpdKgcxBov1jHEa8dr46d2rkVzfHuZFu4fXJ4sFse'
-      startBlock: 0
+      startBlock: 9562480
     mapping:
       apiVersion: 0.0.6
       language: wasm/assemblyscript
@@ -207,6 +207,8 @@ specVersion: 1.3.0
     match data_source {
         DataSourceEnum::Subgraph(ds) => {
             assert_eq!(ds.name, "SubgraphSource");
+            assert_eq!(ds.kind, "subgraph");
+            assert_eq!(ds.source.start_block, 9562480);
         }
         _ => panic!("Expected a subgraph data source"),
     }