fix: Make from and timestamp params optional for UpdateProposal (#908)

* fix: Make it Optional from and timestamp

* Update package.json

Author: ChaituVR

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@snapshot-labs/snapshot.js",
-  "version": "0.6.3",
+  "version": "0.6.4",
   "repository": "snapshot-labs/snapshot.js",
   "license": "MIT",
   "main": "dist/snapshot.cjs.js",

src/sign/types.ts

@@ -31,9 +31,9 @@ export interface Proposal {
 
 export interface UpdateProposal {
   proposal: string;
-  from: string;
+  from?: string;
   space: string;
-  timestamp: number;
+  timestamp?: number;
   type: ProposalType;
   title: string;
   body: string;