build(deps): bump Externals/cryptopp from `78a64e3` to `66e18a2`

Created by: dependabot[bot]

Bumps Externals/cryptopp from 78a64e3 to 66e18a2.

Commits

• 66e18a2 Update Install.txt (PR #1092)
• 9a81d45 Whitespace check-in
• 056084a Update documentation
• a9fe245 Update documentation
• c45c188 Whitespace check-in
• bc2c842 Update License.txt
• c4e257e Update comments in strcpher.cpp
• e546fb7 Add ASSERT in ProcessData to warn of non-distinct buffers (GH #1088)
• b418f93 Update License.txt
• 9dbb3c4 Update documentation (GH #1088)
• Additional commits viewable in compare view

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