fix: assign schema to this.schema not promise

dist/protocol.esm.js

@@ -135,11 +135,11 @@ class GenericSoarProtocol extends GenericProtocol {
     let repository = "https://git.noc.ac.uk/communications-backbone-system/backbone-message-format";
     // TODO check this path resolves for tags
     let url = `${repository}/-/raw/${version}/project/soar/swagger.json`;
-    this.schema = this.axios.get(url)
+    return this.axios.get(url)
     .then((response) => {
+      this.schema = response.data;
       return response.data;
     });
-    return this.schema;
   }
 
   /**

dist/protocol.js

@@ -137,11 +137,11 @@ class GenericSoarProtocol extends GenericProtocol {
     let repository = "https://git.noc.ac.uk/communications-backbone-system/backbone-message-format";
     // TODO check this path resolves for tags
     let url = `${repository}/-/raw/${version}/project/soar/swagger.json`;
-    this.schema = this.axios.get(url)
+    return this.axios.get(url)
     .then((response) => {
+      this.schema = response.data;
       return response.data;
     });
-    return this.schema;
   }
 
   /**

src/protocol/index.js

@@ -135,11 +135,11 @@ export class GenericSoarProtocol extends GenericProtocol {
     let repository = "https://git.noc.ac.uk/communications-backbone-system/backbone-message-format";
     // TODO check this path resolves for tags
     let url = `${repository}/-/raw/${version}/project/soar/swagger.json`;
-    this.schema = this.axios.get(url)
+    return this.axios.get(url)
     .then((response) => {
+      this.schema = response.data
       return response.data;
     });
-    return this.schema;
   }
 
   /**