Add lint for Unix line endings

common/.eslintrc.js

@@ -32,6 +32,7 @@ module.exports = {
   rules: {
     'no-extra-semi': 'off',
     'no-constant-condition': ['error', { checkLoops: false }],
+    'linebreak-style': ['error', 'unix'],
     'lodash/import-scope': [2, 'member'],
   },
 }

functions/.eslintrc.js

@@ -30,6 +30,7 @@ module.exports = {
     },
   ],
   rules: {
+    'linebreak-style': ['error', 'unix'],
     'lodash/import-scope': [2, 'member'],
   },
 }

web/.eslintrc.js

@@ -19,6 +19,7 @@ module.exports = {
     ],
     '@next/next/no-img-element': 'off',
     '@next/next/no-typos': 'off',
+    'linebreak-style': ['error', 'unix'],
     'lodash/import-scope': [2, 'member'],
   },
   env: {