-`isMergeableObject` is now only called if there are two values that could be merged. [a34dd4d2](https://github.com/TehShrike/deepmerge/commit/a34dd4d25bf5e250653540a2022bc832c7b00a19)
- Properties are now only overwritten if they exist on the target object and are enumerable. [#164](https://github.com/TehShrike/deepmerge/pull/164)
Technically this could probably be a patch release since "which properties get overwritten" wasn't documented and accidentally overwriting a built-in function or some function up the property chain would almost certainly be undesirable, but it feels like a gray area, so here we are with a feature version bump.
- Rolled back #167 since `Object.assign` breaks ES5 support. [55067352](https://github.com/TehShrike/deepmerge/commit/55067352a92c65a6c44a5165f3387720aae1e192)
- breaking: the array merge algorithm has changed from a complicated thing to `target.concat(source).map(element => cloneUnlessOtherwiseSpecified(element, optionsArgument))`
- breaking: The `clone` option now defaults to `true`
- feature: `merge.all` now accepts an array of any size, even 0 or 1 elements
See [pull request 77](https://github.com/TehShrike/deepmerge/pull/77).
- bower support: officially dropping bower support. If you use bower, please depend on the [unpkg distribution](https://unpkg.com/deepmerge/dist/umd.js). See [#63](https://github.com/TehShrike/deepmerge/issues/63)
- bug fix: merging objects into arrays was allowed, and doesn't make any sense. [#65](https://github.com/TehShrike/deepmerge/issues/65) published as a feature release instead of a patch because it is a decent behavior change.
- bower support: inline is-mergeable-object in a new CommonJS build, so that people using both bower and CommonJS can bundle the library [0b34e6](https://github.com/TehShrike/deepmerge/commit/0b34e6e95f989f2fc8091d25f0d291c08f3d2d24)
- performance: bump is-mergeable-object dependency version for a slight performance improvement [5906c7](https://github.com/TehShrike/deepmerge/commit/5906c765d691d48e83d76efbb0d4b9ca150dc12c)
- api: instead of only exporting a UMD module, expose a UMD module with `pkg.main`, a CJS module with `pkg.browser`, and an ES module with `pkg.module` [#62](https://github.com/TehShrike/deepmerge/pull/62)
- fix: an error that would be thrown when an array would be merged onto a truthy non-array value: pull request [46](https://github.com/TehShrike/deepmerge/pull/46)
- feature: the ability to clone: Issue [28](https://github.com/TehShrike/deepmerge/issues/28), pull requests [44](https://github.com/TehShrike/deepmerge/pull/44) and [48](https://github.com/TehShrike/deepmerge/pull/48)
- Updating the readme: dropping bower, testing that the example works: [7102fc](https://github.com/TehShrike/deepmerge/commit/7102fcc4ddec11e2d33205866f9f18df14e5aeb5)
-`null`, dates, and regular expressions are now properly merged in arrays: [Issue 18](https://github.com/TehShrike/deepmerge/pull/18), plus commit: [ef1c6b](https://github.com/TehShrike/deepmerge/commit/ef1c6bac8350ba12a24966f0bc7da02560827586)
# 1.0.0
- Should only be a patch change, because this module is READY. [Issue 15](https://github.com/TehShrike/deepmerge/issues/15)
- Regular expressions are now treated like primitive values when merging: [Issue 30](https://github.com/TehShrike/deepmerge/pull/30)
- Dates are now treated like primitives when merging: [Issue 31](https://github.com/TehShrike/deepmerge/issues/31)