update to Go 1.14

.travis.yml

@@ -1,7 +1,7 @@
 language: go
 
 go:
-  - "1.13.x"
+  - "1.14.x"
 
 # first part of the GOARCH workaround
 # setting the GOARCH directly doesn't work, since the value will be overwritten later
@@ -14,7 +14,6 @@ env:
 # now actually set the GOARCH env variable to the value of the temporary variable set earlier
 before_install:
   - |
-    export GO111MODULE=on;
     go get golang.org/x/tools/cmd/cover;
     go get github.com/onsi/ginkgo/ginkgo;
     go get github.com/onsi/gomega;

go.mod

@@ -1,6 +1,6 @@
 module github.com/libp2p/go-libp2p-tls
 
-go 1.12
+go 1.14
 
 require (
 	github.com/libp2p/go-libp2p-core v0.3.0

transport_test.go

@@ -327,9 +327,12 @@ var _ = Describe("Transport", func() {
 
 		transforms := []transform{
 			{
-				name:      "private key used in the TLS handshake doesn't match the public key in the cert",
-				apply:     invalidateCertChain,
-				remoteErr: Equal("tls: invalid certificate signature"),
+				name:  "private key used in the TLS handshake doesn't match the public key in the cert",
+				apply: invalidateCertChain,
+				remoteErr: Or(
+					Equal("tls: invalid signature by the client certificate: ECDSA verification failure"),
+					Equal("tls: invalid signature by the server certificate: ECDSA verification failure"),
+				),
 			},
 			{
 				name:      "certificate chain contains 2 certs",
@@ -339,7 +342,7 @@ var _ = Describe("Transport", func() {
 			{
 				name:      "cert is expired",
 				apply:     expiredCert,
-				remoteErr: Equal("certificate verification failed: x509: certificate has expired or is not yet valid"),
+				remoteErr: ContainSubstring("certificate has expired or is not yet valid"),
 			},
 			{
 				name:      "cert doesn't have the key extension",