enable backtraces in appveyor build
enable backtraces in appveyor build

AssafKatz3/pact-reference,pact-foundation/pact-reference,AssafKatz3/pact-reference,pact-foundation/pact-mock-server,pact-foundation/pact-reference,pact-foundation/pact-reference,pact-foundation/pact-reference,pact-foundation/pact-reference,AssafKatz3/pact-reference,pact-foundation/pact-reference,pact-foundation/pact-reference,pact-foundation/pact-reference,AssafKatz3/pact-reference