build: update to go1.13

Author: Roasbeef

.travis.yml

@@ -8,7 +8,7 @@ cache:
     - $GOPATH/src/gopkg.in/alecthomas
 
 go:
-  - "1.11.x"
+  - "1.13.x"
 
 env:
   global:

go.mod

@@ -1,22 +1,20 @@
 module github.com/lightninglabs/loop
 
 require (
-	github.com/btcsuite/btcd v0.0.0-20190629003639-c26ffa870fd8
+	github.com/btcsuite/btcd v0.0.0-20190824003749-130ea5bddde3
 	github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f
 	github.com/btcsuite/btcutil v0.0.0-20190425235716-9e5f4b9a998d
-	github.com/coreos/bbolt v1.3.2
+	github.com/coreos/bbolt v1.3.3
 	github.com/fortytw2/leaktest v1.3.0
 	github.com/golang/protobuf v1.3.2
 	github.com/google/go-cmp v0.3.1 // indirect
 	github.com/grpc-ecosystem/grpc-gateway v1.10.0
 	github.com/jessevdk/go-flags v1.4.0
-	github.com/lightningnetwork/lnd v0.7.1-beta
+	github.com/lightningnetwork/lnd v0.7.1-beta-rc2.0.20190914085956-35027e52fc22
 	github.com/lightningnetwork/lnd/queue v1.0.1
-	github.com/rogpeppe/fastuuid v1.2.0 // indirect
 	github.com/urfave/cli v1.20.0
 	golang.org/x/crypto v0.0.0-20190829043050-9756ffdc2472 // indirect
 	golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297
-	golang.org/x/sys v0.0.0-20190830142957-1e83adbbebd0 // indirect
 	golang.org/x/text v0.3.2 // indirect
 	google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55
 	google.golang.org/grpc v1.23.0