v0.2.115-5

• fix preversion script 385b23e
• typecheck, lint, cleanup 92c4bd6
• [delta] delta.append & test coverage cf1ae47
• [delta] better diff implementation detecting granular changes on character level 8caa8d1
• [delta] generate deltas automatically for diffing, cover more edge cases ccd29ff
• [schema] pattern matching & random generators 9ff0249
• more test coverage 2eb80b3
• api design: trait modules, test fixes, delta dead code elimitanion 993c4ce

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v0.2.115-4...v0.2.115-5