Update CPM to improve KiCS2 implementation

cpm/src/CPM/Package.curry

cpm/src/CPM/Repository/Select.curry

cpm/src/CPM/Repository/Select.curry.pp

cpm/vendor/json/README.md

cpm/vendor/json/examples/SimpleTest.curry

cpm/vendor/json/package.json

cpm/vendor/json/src/JSON/Convert.curry

cpm/vendor/json/src/JSON/Parser.curry

cpm/vendor/json/test/TestConvert.curry

optimize/.cpm/packages/cass/examples/NonDetEncapsTest.curry

optimize/.cpm/packages/json/README.md

optimize/.cpm/packages/json/examples/SimpleTest.curry

optimize/.cpm/packages/json/package.json

optimize/.cpm/packages/json/src/JSON/Convert.curry

optimize/.cpm/packages/json/src/JSON/Parser.curry

optimize/.cpm/packages/json/test/TestConvert.curry

optimize/.cpm/packages/time/README.md