Merge pull request #126 from nicolasmendoza/docs/update-changelogs

docs: Update README with changelog for version 1.8.0

Author: Manishearth

README.md

@@ -42,6 +42,13 @@ unicode-segmentation = "1.10.1"
 ```
 
 # Change Log
+## 1.8.0
+* [#100](https://github.com/unicode-rs/unicode-segmentation/pull/100) * [#100](https://github.com/unicode-rs/unicode-segmentation/pull/100) - Increase `#[inline]` opportunities, resulting in 15-40% performance improvement.
+* [#95](https://github.com/unicode-rs/unicode-segmentation/pull/98) Implement debug for Graphemes
+* [#94](https://github.com/unicode-rs/unicode-segmentation/pull/94) Add Initial fuzzer for oss-fuzz integration
+* [#93](https://github.com/unicode-rs/unicode-segmentation/pull/93) Fix  unused imports and deprecated pattern warnings
+* [#91](https://github.com/unicode-rs/unicode-segmentation/pull/92) Made local variable immutable by moving it into loop
+* [#91](https://github.com/unicode-rs/unicode-segmentation/pull/91) Add new iterator [UnicodeWordIndices](https://unicode-rs.github.io/unicode-segmentation/unicode_segmentation/struct.UnicodeWordIndices.html) and [unicode_word_indices](https://unicode-rs.github.io/unicode-segmentation/unicode_segmentation/trait.UnicodeSegmentation.html#tymethod.unicode_word_indices)
 
 ## 1.7.1