Add code for dom-merge-conflict

Author: Anna Aitchison

dom-merge-conflict/.gitignore

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+node_modules/

dom-merge-conflict/babel.config.js

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+module.exports = {
+  presets: ["@babel/preset-env"],
+};

dom-merge-conflict/jest.config.js

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+module.exports = {
+  transform: {
+    "^.+\\.js$": "babel-jest",
+  },
+};