Makes evm optional.

Author: Micah Zoltu

index.d.ts

@@ -117,7 +117,7 @@ declare module 'solc' {
         userdoc?: any;
         devdoc?: any;
         ir?: string;
-        evm: {
+        evm?: {
           assembly?: string;
           legacyAssembly?: any;
           bytecode: CompilerOutputEvmBytecode;