manifest: require *_capabilities

Author: nick1udwig

src/kernel_types.rs

@@ -213,8 +213,8 @@ pub struct PackageManifestEntry {
     pub process_wasm_path: String,
     pub on_exit: OnExit,
     pub request_networking: bool,
-    pub request_capabilities: Option<Vec<serde_json::Value>>,
-    pub grant_capabilities: Option<Vec<serde_json::Value>>,
+    pub request_capabilities: Vec<serde_json::Value>,
+    pub grant_capabilities: Vec<serde_json::Value>,
     pub public: bool,
 }