[Snyk] Security upgrade webpack from 1.15.0 to 2.2.0

[jamiesmith]

This PR was automatically created by Snyk using the credentials of a real user.

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
  • package-lock.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	159/1000 Why? Confidentiality impact: None, Integrity impact: None, Availability impact: High, Scope: Unchanged, Exploit Maturity: Proof of Concept, User Interaction (UI): None, Privileges Required (PR): None, Attack Complexity: Low, Attack Vector: Network, EPSS: 0.00109, Social Trends: No, Days since published: 385, Reachable: No, Transitive dependency: Yes, Is Malicious: No, Business Criticality: High, Provider Urgency: High, Package Popularity Score: 99, Impact: 5.99, Likelihood: 2.64, Score Version: V5	Denial of Service (DoS) SNYK-JS-DECODEURICOMPONENT-3149970	Yes	Proof of Concept

(*) Note that the real score may have changed since the PR was raised.

Commit messages

Package name: webpack

The new version differs by 250 commits.

• 4be093d 2.2.0
• 2278469 2.2.0-rc.8
• b946eb4 Merge pull request #3988 from malstoun/bug/2664
• 260e413 Merge pull request #3986 from webpack/bugfix/revert_use_of_buffer_dot_from
• 0ec7de9 Fix regression with watch cli opt, add tests for this case
• 72226db add missing disable line
• 4d30675 build fresh yarn.lock file to remove buffer polyfill
• 91c1f35 fix(node): rollback changes of Buffer.from to new Buffer() and bump down travis to 4.3 min node v
• 0b47602 2.2.0-rc.7
• db6ccbc Merge pull request #3978 from webpack/bugfix/conditional-reexports
• 82a5b03 Merge pull request #3977 from malstoun/bug/2664
• fc1a43b Merge pull request #3976 from timse/rely-on-defaults
• a44694a hoist exports declarations too
• 682bde8 Fix lint
• c6d7d90 Add tests
• af8d49e remove defaults values to shave a few bytes
• 9796696 2.2.0-rc.6
• e9bdb05 Merge pull request #3971 from webpack/bugfix/fix_available_vars_in_fmtp
• bd45bdc add test case for global in harmony modules
• bfccb20 fix PR
• 5a3a23f fix(nmf): Fix exports for var injection to include free glob exports or arguments
• 437dce4 2.2.0-rc.5
• 91cb1df Merge pull request #3970 from webpack/ci/appveyor
• 9fd55e5 Merge pull request #3969 from webpack/bugfix/issue-3964

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