docs: add changelog to repository

CHANGELOG.md

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+# Changelog
+
+## v0.3.1
+
+### 🚀 Enhancements
+
+- **PictureHandler:** Add an upload file button ([ce05f43](https://github.com/MrIsaacs/ocrjs/commit/ce05f43))
+- **Modal:** Add component modal ([ea5df54](https://github.com/MrIsaacs/ocrjs/commit/ea5df54))
+- **Modal:** Add Modal to view and scan images ([a24e7da](https://github.com/MrIsaacs/ocrjs/commit/a24e7da))
+
+### 🩹 Fixes
+
+- **ocrjs:** Change props to data ([0154358](https://github.com/MrIsaacs/ocrjs/commit/0154358))
+- **mobile-view:** No scalable view on mobile ([f6ebe86](https://github.com/MrIsaacs/ocrjs/commit/f6ebe86))
+- **PictureHandler:** Remove heading from component ([85f12e5](https://github.com/MrIsaacs/ocrjs/commit/85f12e5))
+- **PictureHandler:** Change props to data ([18fd35a](https://github.com/MrIsaacs/ocrjs/commit/18fd35a))
+- **lang:** Remove not used language package ([a1e88e0](https://github.com/MrIsaacs/ocrjs/commit/a1e88e0))
+- **Modal:** Seperate save and exit button ([a22b3bb](https://github.com/MrIsaacs/ocrjs/commit/a22b3bb))
+- **Modal:** Allow save if scanned text exists ([9a08620](https://github.com/MrIsaacs/ocrjs/commit/9a08620))
+
+### 💅 Refactors
+
+- Update code according to rules ([5fa6016](https://github.com/MrIsaacs/ocrjs/commit/5fa6016))
+- Rename file- and component-variables ([ade02cd](https://github.com/MrIsaacs/ocrjs/commit/ade02cd))
+
+### 🏡 Chore
+
+- **deps:** Update version and dependencies ([f8052f6](https://github.com/MrIsaacs/ocrjs/commit/f8052f6), [a7a8652](https://github.com/MrIsaacs/ocrjs/commit/a7a8652))
+- **eslint:** Customize coding rules ([06a0e1c](https://github.com/MrIsaacs/ocrjs/commit/06a0e1c))
+- **page:** Change name and title in page ([46646ae](https://github.com/MrIsaacs/ocrjs/commit/46646ae))
+
+### ❤️ Contributors
+
+- Ivan Ilic ([@MrIsaacs](http://github.com/MrIsaacs))
+