chore(breaking): bump Jest to 26 (#128)

* chore(breaking): bump Jest to 26

* update travis, fix flow

* lint fix

Author: thymikee

.travis.yml

@@ -1,7 +1,7 @@
 language: node_js
 node_js:
   - '12'
-  - '8'
+  - '10'
 before_install:
   - yarn global add greenkeeper-lockfile@1
 install: yarn --ignore-engines

__tests__/__snapshots__/snapshotDiff.test.js.snap

@@ -163,7 +163,7 @@ exports[`diffs short strings 1`] = `
 
 exports[`failed optional deps throws with sensible message on missing react-test-renderer 1`] = `
 "Failed to load optional module \\"react-test-renderer\\". If you need to compare React elements, please add \\"react-test-renderer\\" to your project's dependencies.
-Cannot find module 'non-existent-module-for-testing' from 'snapshotDiff.test.js'"
+Cannot find module 'non-existent-module-for-testing' from '__tests__/snapshotDiff.test.js'"
 `;
 
 exports[`shows diff when comparing React fragments of varying length 1`] = `

__tests__/snapshotDiff.test.js

@@ -79,7 +79,11 @@ const noIndentB = `
 `;
 
 type Props = {
-  test: string,
+  test?: string,
+  unnamedFunction?: () => void,
+  unnamedJestMock?: () => void,
+  namedJestMock?: () => void,
+  withSecond?: boolean,
 };
 
 class Component extends React.Component<Props> {

babel.config.js

@@ -2,6 +2,6 @@ module.exports = {
   presets: [
     '@babel/preset-react',
     '@babel/preset-flow',
-    ['@babel/preset-env', { targets: { node: 6 } }],
+    ['@babel/preset-env', { targets: { node: '10' } }],
   ],
 };

package.json

@@ -15,13 +15,16 @@
     "watch": "babel -w src --out-dir build"
   },
   "repository": "https://github.com/thymikee/snapshot-diff",
+  "engines": {
+    "node": ">=10"
+  },
   "peerDependencies": {
     "jest": ">=16"
   },
   "dependencies": {
-    "jest-diff": "^25.1.0",
-    "jest-snapshot": "^25.1.0",
-    "pretty-format": "^25.1.0"
+    "jest-diff": "^26.0.1",
+    "jest-snapshot": "^26.0.1",
+    "pretty-format": "^26.0.1"
   },
   "devDependencies": {
     "@babel/cli": "^7.7.0",
@@ -35,7 +38,7 @@
     "enzyme-to-json": "^3.4.0",
     "eslint": "^6.6.0",
     "flow-bin": "^0.123.0",
-    "jest": "^24.0.0",
+    "jest": "^26.0.1",
     "react": "^16.13.1",
     "react-dom": "16.13.1",
     "react-test-renderer": "^16.13.1"

src/index.js

@@ -76,7 +76,7 @@ function diffStrings(valueA: any, valueB: any, options: Options) {
     contextLines: options.contextLines,
     aAnnotation: options.aAnnotation,
     bAnnotation: options.bAnnotation,
-    ...(!options.colors ? noDiffColors : {})
+    ...(!options.colors ? noDiffColors : {}),
   });
 }