chore: release 1.5.0 (#12)

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CHANGELOG.md

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+# Changelog
+
+## [1.5.0](https://www.github.com/hbollon/go-edlib/compare/v1.4.0...v1.5.0) (2021-11-21)
+
+
+### Features
+
+* add k-gram shingle to Jaccard/Cosine sim ([#11](https://www.github.com/hbollon/go-edlib/issues/11)) ([24d61a6](https://www.github.com/hbollon/go-edlib/commit/24d61a62ee09eef2a930322cfbb0d4f13f13c5ca))