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Update CDT to 2.0.1 - #19
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CDT 2.0.1 splits an existing edge at a vertex that lies on it within tolerance when that edge is inserted as a constraint (CDT #232). Before, the edge was fixed right away and the vertex could be left as the apex of a zero-area triangle. The change is internal to the header-only library, so the bindings need no changes.
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Bumps the CDT submodule from 2.0.0 (+4 commits, f823602) to the 2.0.1 tag (53eff28).
CDT 2.0.1 fixes a case where a constraint edge that already exists in the triangulation was fixed right away, leaving a vertex lying on it within tolerance as the apex of a zero-area triangle. It now splits the edge at that vertex (artem-ogre/CDT#232, fixes artem-ogre/CDT#230). The only header change is a new private helper, so the public API and the bindings are unchanged.