[Snyk] Fix for 1 vulnerabilities

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:

  • package.json

• Adding or updating a Snyk policy (.snyk) file; this file is required in order to apply Snyk vulnerability patches.
  Find out more.

Vulnerabilities that will be fixed

With a Snyk patch:

Severity	Issue	Exploit Maturity
	Prototype Pollution SNYK-JS-LODASH-567746	Proof of Concept

Check the changes in this PR to ensure they won't cause issues with your project.

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Note: You are seeing this because you or someone else with access to this repository has authorized Snyk to open fix PRs.

For more information:

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📚 Read more about Snyk's upgrade and patch logic

[ci-reporter]

The build is failing

✨ Good work on this PR so far! ✨ Unfortunately, the Travis CI build is failing as of 9eaf518. Here's the output:

npm test

> [email protected] test /home/travis/build/jstransformers/jstransformer-transparency
> test-jstransformer

 • transparency
   ✓ transform has an output format (0ms)
   ✓ transparency.compile() (21ms)

Total duration 30ms
tests passed

> [email protected] posttest /home/travis/build/jstransformers/jstransformer-transparency
> xo --space=2 --no-semicolon index.js

/home/travis/build/jstransformers/jstransformer-transparency/node_modules/fs-extra/lib/mkdirs/make-dir.js:86
      } catch {
              ^

SyntaxError: Unexpected token {
    at createScript (vm.js:80:10)
    at Object.runInThisContext (vm.js:139:10)
    at Module._compile (module.js:617:28)
    at Object.Module._extensions..js (module.js:664:10)
    at Module.load (module.js:566:32)
    at tryModuleLoad (module.js:506:12)
    at Function.Module._load (module.js:498:3)
    at Module.require (module.js:597:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (/home/travis/build/jstransformers/jstransformer-transparency/node_modules/fs-extra/lib/mkdirs/index.js:3:44)

I'm sure you can fix it! If you need help, don't hesitate to ask a maintainer of the project!

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