[Tooling] switch to yarn (#92)

Jenkinsfile

@@ -14,34 +14,34 @@ pipeline {
         }
         stage('Contracts: Build') {
             steps {
-                sh 'npm install'
-                sh 'npm run build:contracts'
+                sh 'yarn install'
+                sh 'yarn run build:contracts'
             }
         }
         stage('Contracts: Lint') {
             steps {
-                sh 'npm run lint:contracts'
+                sh 'yarn run lint:contracts'
             }
         }
         stage('Contracts: Test') {
             steps {
-                sh 'npm run test:contracts'
+                sh 'yarn run test:contracts'
             }
         }
         stage('Contracts: Coverage') {
             steps {
-                sh 'npm run coverage:contracts'
+                sh 'yarn run coverage:contracts'
                 sh './node_modules/.bin/istanbul report cobertura --root .'
             }
         }
         stage('Dapp: Build') {
             steps {
-                sh 'npm run build:app'
+                sh 'yarn run build:app'
             }
         }
         stage('Dapp: Test') {
             steps {
-                sh 'npm run test:app:ci'
+                sh 'yarn run test:app:ci'
             }
         }
     }

README.md

@@ -11,10 +11,10 @@ describes how to use the contracts for onchain permissioning.
 ## Development
 
 ### Linting
-Linting is set up using solium. To run it over your code execute `npm run lint`.
+Linting is set up using solium. To run it over your code execute `yarn run lint`.
 
 ### Testing
-`npm test`
+`yarn test`
 
 ### Permissioning Management Dapp (under development)
 
@@ -33,7 +33,7 @@ This is the easiest way to get started for development with the permissioning Da
 
 #### Start the development server ####
 1. In a new terminal session, navigate to the `app/` directory 
-1. Run `npm install` to install all required dependencies and `npm start` to start the web server that is serving our dapp. You only need to run `npm install` if you are running the app for the first time.
+1. Run `yarn install` to install all required dependencies and `yarn run start` to start the web server that is serving our dapp. You only need to run `yarn install` if you are running the app for the first time.
 1. In your browser, connect Metamask to the Ganache network (the default endpoint is `http://127.0.0.1:9545/`)
 1. When you start Ganache, it gives you a list of accounts and private keys. Import the first one in Metamask to impersonate the first admin of the system.
 1. Navigate to `http://localhost:3000` to access the Permissioning Dapp.
@@ -42,7 +42,6 @@ This is the easiest way to get started for development with the permissioning Da
 #### Build the permissioning Dapp for deployment ####
 
 1. [Compile and migrate the contracts](#compile-and-migrate-the-contracts)
-1. In a new terminal session, navigate to the `app/` directory
-1. Run `npm run build` will assemble index.html and all other files in `build/`
+1. Run `yarn run build` will assemble index.html and all other files in `build/`
 1. You can use your preferred web server technology to serve the contents of `build/` as static files.
 1. You will need to set up MetaMask as for [the development server](#start-the-development-server)

package.json

@@ -5,20 +5,20 @@
   "license": "Apache-2.0",
   "private": true,
   "scripts": {
-    "lint:contracts": "solium -d contracts",
-    "lint": "npm run lint:contracts",
-    "test:app": "react-scripts test --env=jsdom --watchAll=false",
-    "test:app:watch": "react-scripts test --env=jsdom",
-    "test:app:ci": "react-scripts test --reporters=default --reporters=jest-junit",
-    "test:contracts": "truffle test --network develop",
-    "test": "npm run test:contracts && npm run test:app",
-    "coverage:contracts": "solidity-coverage",
-    "coverage": "npm run coverage:contracts",
-    "build:app": "react-scripts build",
-    "build:contracts": "truffle compile",
-    "build": "npm run build:contracts && npm run build:app",
-    "start": "react-scripts start",
-    "eject": "react-scripts eject"
+    "lint:contracts": "yarn solium -d contracts",
+    "lint": "yarn run lint:contracts",
+    "test:app": "yarn react-scripts test --env=jsdom --watchAll=false",
+    "test:app:watch": "yarn react-scripts test --env=jsdom",
+    "test:app:ci": "yarn react-scripts test --reporters=default --reporters=jest-junit",
+    "test:contracts": "yarn truffle test --network develop",
+    "test": "yarn run test:contracts && yarn run test:app",
+    "coverage:contracts": "yarn solidity-coverage",
+    "coverage": "yarn run coverage:contracts",
+    "build:app": "yarn react-scripts build",
+    "build:contracts": "yarn truffle compile",
+    "build": "yarn run build:contracts && yarn run build:app",
+    "start": "yarn react-scripts start",
+    "eject": "yarn react-scripts eject"
   },
   "eslintConfig": {
     "extends": "react-app"
@@ -72,7 +72,7 @@
     "prettier": "^1.17.0",
     "solidity-coverage": "github:sc-forks/solidity-coverage#leapdao",
     "solium": "^1.2.4",
-    "truffle": "^5.0.12"
+    "truffle": "5.0.17"
   },
   "lint-staged": {
     "src/**/*.{js,jsx,json,css}": [

truffle-config.js

@@ -43,7 +43,7 @@ module.exports = {
 
   compilers: {
     solc: {
-      version: "0.5.7",
+      version: "0.5.9",
       settings: {
        optimizer: {
          enabled: false,