Add diff-sequences package (#5407)

* Add diff-sequences package * Update CHANGELOG.md * Replace NOT_YET_USED with NOT_YET_SET * Replace utility with command * Tame prettier * Add 4 tests * Replace with type cast to any * Fix prettier errors * Remove export from type declarations * Correct aLength and bLength in README.md
jestjs · Feb 7, 2018 · ad91d0a · ad91d0a
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ### Features
 
+* `[diff-sequences]` New package compares items in two sequences to find a
+  **longest common subsequence**.
+  ([#5407](https://github.com/facebook/jest/pull/5407))
 * `[jest-config]` Allow lastComit and changedFilesWithAncestor via JSON config
   ([#5476](https://github.com/facebook/jest/pull/5476))
 * `[jest-util]` Add deletion to `process.env` as well

diff --git a/packages/diff-sequences/.npmignore b/packages/diff-sequences/.npmignore
@@ -0,0 +1,3 @@
+**/__mocks__/**
+**/__tests__/**
+src