fix: add type defs for getEpochInfo

web3.js/module.flow.js

@@ -179,6 +179,13 @@ declare module '@solana/web3.js' {
     firstNormalSlot: number,
   };
 
+  declare export type EpochInfo = {
+    epoch: number,
+    slotIndex: number,
+    slotsInEpoch: number,
+    absoluteSlot: number,
+  };
+
   declare export type VoteAccountStatus = {
     current: Array<VoteAccountInfo>,
     delinquent: Array<VoteAccountInfo>,
@@ -238,6 +245,7 @@ declare module '@solana/web3.js' {
     getVersion(): Promise<Version>;
     getInflation(commitment: ?Commitment): Promise<Inflation>;
     getEpochSchedule(): Promise<EpochSchedule>;
+    getEpochInfo(): Promise<EpochInfo>;
     getRecentBlockhashAndContext(
       commitment: ?Commitment,
     ): Promise<RpcResponseAndContext<BlockhashAndFeeCalculator>>;