fix: add getMinimumBalanceForRentExemption and getBlock to flow

web3.js/module.flow.js

@@ -201,6 +201,15 @@ declare module '@solana/web3.js' {
     onSlotChange(callback: SlotChangeCallback): number;
     removeProgramAccountChangeListener(id: number): Promise<void>;
     validatorExit(): Promise<boolean>;
+    getMinimumBalanceForRentExemption(
+      dataLength: number,
+      commitment: ?Commitment,
+    ): Promise<number>;
+   getBlock(
+      slot: number,
+    ): Promise<
+      Array<[Transaction, SignatureSuccess] | [Transaction, TransactionError]>,
+    >;
   }
 
   // === src/stake-program.js ===

web3.js/package-lock.json

@@ -9741,7 +9741,8 @@
       "version": "4.2.1",
       "resolved": "https://registry.npmjs.org/hoek/-/hoek-4.2.1.tgz",
       "integrity": "sha512-QLg82fGkfnJ/4iy1xZ81/9SIJiq1NGFUMGs6ParyjBZr6jW2Ufj/snDqTHixNlHdPNwN2RLVD0Pi3igeK9+JfA==",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "hook-std": {
       "version": "2.0.0",
@@ -9879,7 +9880,8 @@
           "version": "2.7.0",
           "resolved": "https://registry.npmjs.org/acorn/-/acorn-2.7.0.tgz",
           "integrity": "sha1-q259nYhqrKiwhbwzEreaGYQz8Oc=",
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "acorn-globals": {
           "version": "1.0.9",