hash 'rmd160' not in chromium54/node/... build

[mrose17]

the bitcoin libraries use the 'rmd160' hash, which isn't there!

    callback: Error: Digest method not supported
    Error: Digest method not supported
        at new Hash (crypto.js:56:18)
        at Hash (crypto.js:55:12)
        at ripemd160 (/Users/mrose/Desktop/brave/browser-laptop/node_modules/bitcoinjs-lib/src/crypto.js:12:10)
        at Object.hash160 (/Users/mrose/Desktop/brave/browser-laptop/node_modules/bitcoinjs-lib/src/crypto.js:4:10)
        at HDNode.getIdentifier (/Users/mrose/Desktop/brave/browser-laptop/node_modules/bitcoinjs-lib/src/hdnode.js:132:18)
        at HDNode.getFingerprint (/Users/mrose/Desktop/brave/browser-laptop/node_modules/bitcoinjs-lib/src/hdnode.js:136:15)
        at HDNode.derive (/Users/mrose/Desktop/brave/browser-laptop/node_modules/bitcoinjs-lib/src/hdnode.js:274:31)
        at deriveFast (/Users/mrose/Desktop/brave/browser-laptop/node_modules/bitgo/src/bitcoin.js:54:19)
        at derive (/Users/mrose/Desktop/brave/browser-laptop/node_modules/bitgo/src/bitcoin.js:159:17)
        at derive (/Users/mrose/Desktop/brave/browser-laptop/node_modules/bitgo/src/bitcoin.js:147:21)