Update deepmerge requirement from ^0.2.10 to ^3.3.0

[dependabot-preview]

Updates the requirements on deepmerge to permit the latest version.

Changelog

Sourced from deepmerge's changelog.

3.3.0

• Enumerable Symbol properties are now copied #151

3.2.1

• bumping dev dependency versions to try to shut up bogus security warnings from Github/npm #149

3.2.0

• feature: added the customMerge option #133

3.1.0

• typescript typing: make the all function generic #129

3.0.0

• drop ES module build #123

2.2.1

• bug: typescript export type was wrong #121

2.2.0

• feature: added TypeScript typings #119

2.1.1

• documentation: Rename "methods" to "api", note ESM syntax #103
• documentation: Fix grammar #107
• documentation: Restructure headers for clarity + some wording tweaks 108 + 109

2.1.0

• feature: Support a custom isMergeableObject function #96
• documentation: note a Webpack bug that some users might need to work around #100

2.0.1

• documentation: fix the old array merge algorithm in the readme. #84

2.0.0

• 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

... (truncated)

Commits

• 58cc468 3.3.0
• 1774bdf Rename "expected" to "output" in example
• b422c60 Drop the 1->2 migration notice in the readme
• 8acd8b9 Changelog for 3.3.0
• 28a6e61 Fix a word + update bundle size
• eb8e010 Another couple assertions for Symbols
• f1fd9fe Formatting/indentation
• b83313e Fix readme tests that broke when I changed var to const
• f5f67eb Support symbol keys (#151)
• 2f0e45a Limit to enumerable symbols
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #30.