Merge remote-tracking branch 'util/monorepo' into monorepo-add-util

Author: holgerd77

packages/util/.eslintrc.js

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+module.exports = {
+  extends: '@ethereumjs/eslint-config-defaults'
+}

packages/util/.github/contributing.md

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+# Contributing
+
+Great that you want to contribute to the `EthereumJS` [ecosystem](https://ethereumjs.readthedocs.io/en/latest/introduction.html). `EthereumJS` is managed by the Ethereum Foundation and largely driven by the wider community. Everyone is welcome to join the effort and help to improve on the libraries (see our [Code of Conduct](https://ethereumjs.readthedocs.io/en/latest/code_of_conduct.html) 🌷).
+
+We have written up some [Contribution Guidelines](https://ethereumjs.readthedocs.io/en/latest/contributing.html#how-to-start) to help you getting started.
+
+These include information on how we work with **Git** and how our **general workflow** and **technical setup** looks like (stuff like language, tooling, code quality and style).
+
+Happy Coding! 👾 😀 💻

packages/util/.github/workflows/build.yml

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+name: Build
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - '*'
+  pull_request:
+    types: [opened, reopened, synchronize]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x, 13.x, 14.x]
+
+    steps:
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - uses: actions/checkout@v2
+      - run: npm install
+
+      - run: npm run lint
+      - run: npm run coverage
+
+      - uses: codecov/codecov-action@v1
+        if: matrix.node-version == '12.x'
+        with:
+          file: ./coverage/lcov.info

packages/util/.gitignore

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+.idea/
+
+### App ###
+
+.cachedb
+
+
+# Created by https://www.gitignore.io/api/osx,node
+
+### OSX ###
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+
+### Node ###
+# Logs
+logs
+*.log
+npm-debug.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directory
+# https://docs.npmjs.com/misc/faq#should-i-check-my-node-modules-folder-into-git
+node_modules
+package-lock.json
+
+# Build folder
+dist
+

packages/util/.prettierignore

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+node_modules
+.vscode
+package.json
+dist
+.nyc_output
+test/testdata
+docs