- Fix type definition for arrayMerge options.  #239
 
- Avoid thrown errors if the target doesn't have 
propertyIsEnumerable.  #252 
isMergeableObject is now only called if there are two values that could be merged.  a34dd4d2 
- Fix: falsey values can now be merged.  #170
 
- Properties are now only overwritten if they exist on the target object and are enumerable.  #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 
- The 
options argument is no longer mutated #167 
cloneUnlessOtherwiseSpecified is now exposed to the arrayMerge function #165 
- The 
main entry point in package.json is now a CommonJS module instead of a UMD module #155 
- Enumerable Symbol properties are now copied #151
 
- bumping dev dependency versions to try to shut up bogus security warnings from Github/npm #149
 
- typescript typing: make the 
all function generic #129 
- drop ES module build #123
 
- bug: typescript export type was wrong #121
 
- feature: added TypeScript typings #119
 
- documentation: Rename "methods" to "api", note ESM syntax #103
 
- documentation: Fix grammar #107
 
- documentation: Restructure headers for clarity + some wording tweaks 108 + 109
 
- feature: Support a custom 
isMergeableObject function #96 
- documentation: note a Webpack bug that some users might need to work around #100
 
- documentation: fix the old array merge algorithm in the readme.  #84
 
- 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.
- fix: no longer attempts to merge React elements #76
 
- bower support: officially dropping bower support.  If you use bower, please depend on the unpkg distribution.  See #63
 
- bug fix: merging objects into arrays was allowed, and doesn't make any sense. #65 published as a feature release instead of a patch because it is a decent behavior change.
 
- bower support: updated 
main in bower.json 
- bower support: inline is-mergeable-object in a new CommonJS build, so that people using both bower and CommonJS can bundle the library 0b34e6
 
- performance: bump is-mergeable-object dependency version for a slight performance improvement 5906c7
 
- documentation: fix unpkg link acc45b
 
- 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 
- documentation: note the minified/gzipped file sizes 56
 
- documentation: make data structures more readable in merge example: pull request 57
 
- documentation: clarify and test some array merging documentation: pull request 51
 
- feature: 
merge.all, a merge function that merges any number of objects: pull request 50 
- fix: an error that would be thrown when an array would be merged onto a truthy non-array value: pull request 46
 
- feature: the ability to clone: Issue 28, pull requests 44 and 48
 
- maintenance: added tests + travis to 
.npmignore: pull request 47 
- fix an issue where an error was thrown when merging an array onto a non-array: Pull request 46
 
- allow consumers to specify their own array merging algorithm: Pull request 37
 
- adding bower.json back: Issue 38
 
- updating keywords and Github links in package.json bc3898e
 
- Updating the readme: dropping bower, testing that the example works: 7102fc
 
null, dates, and regular expressions are now properly merged in arrays: Issue 18, plus commit: ef1c6b 
1.0.0
- Should only be a patch change, because this module is READY. Issue 15
 
- Regular expressions are now treated like primitive values when merging: Issue 30
 
- Dates are now treated like primitives when merging: Issue 31