bundle keccak, pre-patched

.travis.yml

@@ -33,5 +33,6 @@ before_install:
     fi
 
 script:
+  - npm run prepare
   - npm run test
   - npm run test-smoke

package.json

@@ -16,15 +16,18 @@
     "build": "webpack-cli --config ./webpack/node/core.webpack.config.js",
     "build-web": "webpack-cli --config ./webpack/web-experimental/core.webpack.config.js",
     "format": "prettier --write \"{lib,perf,test}/**/*.js\" && eslint --fix --ignore-path .gitignore .",
+    "prepare": "patch-package",
     "prepublishOnly": "npm run test && npm run build && npm run test-build && npm prune --production && mv npm-shrinkwrap.json npm-shrinkwrap.json.bak && npm shrinkwrap",
-    "postinstall": "patch-package",
     "postpublish": "rm npm-shrinkwrap.json && mv npm-shrinkwrap.json.bak npm-shrinkwrap.json && npm ci",
     "test": "npm run _lint && npm run nyc_mocha ./test/local",
     "test-smoke": "npm run _mocha ./test/smoke",
     "test-build": "cross-env TEST_BUILD=node npm run _mocha",
     "test-web-experimental": "cross-env TEST_BUILD=web-experimental npm run _mocha",
     "coverage": "nyc report --reporter=text-lcov | coveralls"
   },
+  "bundleDependencies": [
+    "keccak"
+  ],
   "dependencies": {
     "abstract-leveldown": "3.0.0",
     "async": "2.6.2",
@@ -43,6 +46,7 @@
     "ethereumjs-vm": "4.2.0",
     "ethereumjs-wallet": "0.6.5",
     "heap": "0.2.6",
+    "keccak": "3.0.1",
     "level-sublevel": "6.6.4",
     "levelup": "3.1.1",
     "lodash": "4.17.14",