[Snyk] Security upgrade solc from 0.4.26 to 0.5.11

[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

Vulnerabilities that will be fixed

With an upgrade:

Severity	Issue	Breaking Change	Exploit Maturity
	Prototype Pollution SNYK-JS-YARGSPARSER-560381	No	Proof of Concept

Commit messages

Package name: solc

The new version differs by 219 commits.

• becf99d Merge pull request #376 from ethereum/bumpVersion
• 861f954 Set version to 0.5.11.
• e893abd Merge pull request #375 from ethereum/tapeTest
• f2a8df4 Require tape ^4.11.0 instead of fixing tape 4.9.2.
• 6d17c5b Merge pull request #372 from ethereum/yargs-update
• 4a4b06d Update to latest yargs
• 9b1f06a Merge pull request #370 from ethereum/smtsolver-fs
• e971f76 Remove dependency on fs-extra in smtsolver
• bedf80d Merge pull request #357 from MicahZoltu/js-sha3
• f441441 Removes ethereumjs-util and keccak dependencies.
• ea40b79 Merge pull request #369 from ethereum/nodejs12
• c6d9ddd Test on node.js v12 too
• 2dd4320 Merge pull request #368 from ethereum/version0510
• 3ed57cc Set version to 0.5.10
• 55a274b Merge pull request #367 from PascalPrecht/fix/cli-output
• 234223a fix: ensure CLI replaces path separator on Windows platforms correctly
• 366c91e Merge pull request #363 from ethereum/version059
• 0856845 Set version to 0.5.9.
• b1a098a Merge pull request #354 from ethereum/version058
• f4940d2 Set version to 0.5.8.
• 40b8fc3 Merge pull request #348 from ethereum/v057
• 7eedba3 Version 0.5.7
• 0393c91 Merge pull request #346 from Nitro888/master
• ab31291 requrie -> require

See the full diff

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

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