Contracts verification up to 10 libraries

[vbaranov]

Motivation

For some contracts, the max limit of 5 libraries for verification is not enough.

Changelog

Increase max number of libraries up to 10 in contracts verification

Checklist for your Pull Request (PR)

• I added an entry to CHANGELOG.md with this PR
• If I added new functionality, I added tests covering it.
• If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.
• I checked whether I should update the docs and did so by submitting a PR to https://github.com/blockscout/docs
• If I added/changed/removed ENV var, I submitted a PR to https://github.com/blockscout/docs to update the list of env vars at https://github.com/blockscout/docs/blob/master/for-developers/information-and-settings/env-variables.md and I updated the version to master in the Version column. Changes will be reflected in this table: https://docs.blockscout.com/for-developers/information-and-settings/env-variables.
• If I add new indices into DB, I checked, that they are not redundant with PGHero or other tools

[coveralls]

Pull Request Test Coverage Report for Build 7c6f043a8ef88ec71b94394fc974063c22ed3770-PR-3618

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+1.6%) to 64.986%

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Files with Coverage Reduction	New Missed Lines	%
test/block_scout_web/features/pages/chain_page.ex	1	90.0%

Totals
Change from base Build 0f54f4d9fb770badf99eaedffb232ddc010f6a5a:	1.6%
Covered Lines:	2101
Relevant Lines:	3233

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💛 - Coveralls