Define types for ethereumjs-abi

packages/contracts/globals.d.ts

@@ -1,5 +1,4 @@
 declare module 'bn.js';
-declare module 'ethereumjs-abi';
 declare module 'chai-bignumber';
 declare module 'dirty-chai';
 
@@ -30,6 +29,10 @@ declare module 'web3-eth-abi' {
     export function encodeParameters(typesArray: string[], parameters: any[]): string;
 }
 
+declare module 'ethereumjs-abi' {
+    const soliditySHA3: (argTypes: string[], args: any[]) => Buffer;
+}
+
 // Truffle injects the following into the global scope
 declare var artifacts: any;
 declare var contract: any;