chore: use npm instead of yarn

Author: nickserv

.travis.yml

@@ -1,29 +1,19 @@
 sudo: false
 language: node_js
-cache:
-  yarn: true
-  directories:
-  - "~/.npm"
 notifications:
   email: false
 node_js:
   - '10'
   - '12'
   - '14'
-env:
-  global:
-    - PATH=$HOME/.yarn/bin:$PATH
-before_install:
-  - curl -o- -L https://yarnpkg.com/install.sh | bash
-install: yarn
-script: yarn validate
+script: npm run validate
 jobs:
   include:
-  - stage: release
-    node_js: '14'
-    deploy:
-      provider: script
-      script: yarn test:update && npx codecov && npx semantic-release
-      skip_cleanup: true
+    - stage: release
+      node_js: '14'
+      deploy:
+        provider: script
+        script: npm run test:update && npx codecov && npx semantic-release
+        skip_cleanup: true
 branches:
   only: master

CONTRIBUTING.md

@@ -7,12 +7,8 @@ to an Open Source Project on GitHub][egghead]
 
 ## Project setup
 
-Make sure that Yarn is installed.
-<br>
-Installation instructions can be found here: https://yarnpkg.com/en/docs/install.
-
 1.  Fork and clone the repo
-2.  Run `yarn setup` to install dependencies and run validation
+2.  Run `npm run setup -s` to install dependencies and run validation
 3.  Create a branch for your PR with `git checkout -b pr/your-branch-name`
 
 > Tip: Keep your `master` branch pointing at the original repository and make pull requests from
@@ -32,7 +28,7 @@ Installation instructions can be found here: https://yarnpkg.com/en/docs/install
 
 ## Committing and Pushing changes
 
-Please make sure to run the tests before you commit your changes. You can run `yarn test:update`
+Please make sure to run the tests before you commit your changes. You can run `npm run test:update`
 which will update any snapshots that need updating. Make sure to include those changes (if they
 exist) in your commit.
 

package.json

@@ -41,10 +41,10 @@
     "clean": "rimraf dist",
     "build": " babel src --out-dir dist --ignore '**/__tests__/**,**/__mocks__/**'",
     "test": "jest src/__tests__ ",
-    "test:watch": "yarn test --watch",
-    "test:update": "yarn test --updateSnapshot --coverage",
-    "setup": "yarn && yarn validate",
-    "validate": "yarn lint && yarn test && yarn clean && yarn build",
+    "test:watch": "npm test --watch",
+    "test:update": "npm test --updateSnapshot --coverage",
+    "setup": "npm install && npm run validate",
+    "validate": "npm run lint && npm test && npm run clean && npm run build",
     "contributors:add": "all-contributors add",
     "contributors:generate": "all-contributors generate"
   },
@@ -94,17 +94,17 @@
   },
   "lint-staged": {
     "README.md": [
-      "yarn toc",
+      "npm run toc",
       "prettier --parser markdown --write",
       "git add"
     ],
     ".all-contributorsrc": [
-      "yarn contributors:generate",
+      "npm run contributors:generate",
       "git add"
     ],
     "**/*.js": [
-      "yarn lint",
-      "yarn test",
+      "npm run lint",
+      "npm test",
       "git add"
     ]
   },