Switch to github.com/creack/pty

The old pty package uses Setctty in a wrong way that broke in Go 1.15.

Updates #77.

go.mod

@@ -1,10 +1,12 @@
 module github.com/cespare/reflex
 
+go 1.15
+
 require (
+	github.com/creack/pty v1.1.11
 	github.com/fsnotify/fsnotify v1.4.7
 	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51
 	github.com/kr/pretty v0.1.0
-	github.com/kr/pty v1.1.2
 	github.com/ogier/pflag v0.0.1
 	golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e // indirect
 )

go.sum

@@ -1,12 +1,12 @@
+github.com/creack/pty v1.1.11 h1:07n33Z8lZxZ2qwegKbObQohDhXDQxiMMz1NOUGYlesw=
+github.com/creack/pty v1.1.11/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 h1:Z9n2FFNUXsshfwJMBgNA0RU6/i7WVaAegv3PtuIHPMs=
 github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51/go.mod h1:CzGEWj7cYgsdH8dAjBGEr58BoE7ScuLd+fwFZ44+/x8=
 github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
-github.com/kr/pty v1.1.2 h1:Q7kfkJVHag8Gix8Z5+eTo09NFHV8MXL9K66sv9qDaVI=
-github.com/kr/pty v1.1.2/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/ogier/pflag v0.0.1 h1:RW6JSWSu/RkSatfcLtogGfFgpim5p7ARQ10ECk5O750=

reflex.go

@@ -13,7 +13,7 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/kr/pty"
+	"github.com/creack/pty"
 )
 
 // A Reflex is a single watch + command to execute.