Update go-whatsapp to fix file uploading

go.mod

@@ -19,4 +19,4 @@ require (
 	maunium.net/go/mautrix-appservice v0.1.0-alpha.6
 )
 
-replace github.com/Rhymen/go-whatsapp => github.com/tulir/go-whatsapp v0.2.0
+replace github.com/Rhymen/go-whatsapp => github.com/tulir/go-whatsapp v0.2.1

go.sum

@@ -29,6 +29,8 @@ github.com/skip2/go-qrcode v0.0.0-20191027152451-9434209cb086 h1:RYiqpb2ii2Z6J4x
 github.com/skip2/go-qrcode v0.0.0-20191027152451-9434209cb086/go.mod h1:PLPIyL7ikehBD1OAjmKKiOEhbvWyHGaNDjquXMcYABo=
 github.com/tulir/go-whatsapp v0.2.0 h1:JWK/Xxrc1qsZsVz6gYVX5AtvzYmqaHNjt34Ipnrgz88=
 github.com/tulir/go-whatsapp v0.2.0/go.mod h1:gyw9zGup1/Y3ZQUueZaqz3iR/WX9a2Lth4aqEbXjkok=
+github.com/tulir/go-whatsapp v0.2.1 h1:Owoss2AbvZMgt3nxoFlsG+bqLHDnO+PhXNhhoCmb/3M=
+github.com/tulir/go-whatsapp v0.2.1/go.mod h1:gyw9zGup1/Y3ZQUueZaqz3iR/WX9a2Lth4aqEbXjkok=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90PveolxSbWFaJdECFbxSq0Mqo2M=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=