getting eslint to work

package.json

@@ -13,14 +13,14 @@
     "node": ">=4"
   },
   "scripts": {
-    "prepublishOnly": "rm -fr ./dist & babel ./src --out-dir ./dist -s inline && yarn test-jest",
+    "prepublishOnly": "rm -fr ./dist & babel ./src --out-dir ./dist -s inline && yarn test:unit",
     "predeploy": "yarn styleguide:build",
     "deploy": "gh-pages -d styleguide",
     "postpublish": "yarn deploy && git tag $npm_package_version && git push origin $npm_package_version",
     "start": "styleguidist server",
     "build": "styleguidist build",
-    "test-jest": "jest __tests__",
-    "test": "jest __tests__ && cat ./coverage/lcov.info | coveralls",
+    "test:unit": "eslint ./src && jest __tests__",
+    "test": "yarn test:unit && cat ./coverage/lcov.info | coveralls",
     "create-coverage-badge": "bash scripts/create-badge-json.sh"
   },
   "dependencies": {
@@ -40,13 +40,23 @@
   "devDependencies": {
     "@babel/cli": "^7.5.0",
     "@babel/core": "^7.4.5",
+    "@babel/plugin-transform-runtime": "^7.5.0",
     "@babel/preset-env": "^7.4.5",
     "@babel/preset-react": "^7.0.0",
-    "@babel/plugin-transform-runtime": "^7.5.0",
     "@material-ui/core": "^4.6.1",
     "@material-ui/icons": "^4.5.1",
     "@types/jest": "24.0.22",
+    "babel-eslint": "^10.1.0",
     "coveralls": "^3.0.9",
+    "eslint": "^5.12.1",
+    "eslint-config-google": "^0.12.0",
+    "eslint-config-react-app": "^5.2.1",
+    "eslint-plugin-flowtype": "^5.2.0",
+    "eslint-plugin-import": "^2.22.0",
+    "eslint-plugin-jest": "^22.1.3",
+    "eslint-plugin-jsx-a11y": "^6.3.1",
+    "eslint-plugin-react": "^7.20.6",
+    "eslint-plugin-react-hooks": "^4.1.0",
     "fs-extra": "4.0.3",
     "gh-pages": "^3.1.0",
     "react": "^16.8.6",
@@ -69,7 +79,6 @@
     "dist/*"
   ],
   "jest": {
-    "collectCoverage": true,
     "collectCoverageFrom": [
       "src/core/**.{js,jsx,ts}",
       "!**/node_modules/**",

src/demos/book-package-check/BookPackageCheck.js

@@ -145,6 +145,7 @@ function BookPackageCheck(/*username, language_code, bookID,*/ props) {
 
             // console.log("Finished rendering bit.");
         })(); // end of async part in unnamedFunction
+      // eslint-disable-next-line react-hooks/exhaustive-deps
     }, [bookID, branch, JSON.stringify(checkingOptions), language_code, JSON.stringify(props), username]); // end of useEffect part
 
     if (bookID!=='OBS' && !books.isValidBookID(bookID))

src/demos/book-packages-check/BookPackagesCheck.js

@@ -155,6 +155,7 @@ function BookPackagesCheck(/*username, language_code, bookIDs,*/ props) {
       // console.log("Finished rendering bit.");
     })(); // end of async part in unnamedFunction
     // Doesn't work if we add this to next line: bookIDList,bookIDs,username,branch,checkingOptions,language_code,props
+  // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [JSON.stringify(bookIDList), bookIDs, branch, JSON.stringify(checkingOptions), language_code, JSON.stringify(props), username]); // end of useEffect part
 
   if (bookIDInvalid) {