Update to latest newt/newtmgr deps
diff --git a/go.mod b/go.mod
index 571f919..730f94b 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,6 @@
 go 1.12
 
 require (
-	mynewt.apache.org/newt v0.0.0-20190723172213-9f7829a76fef
-	mynewt.apache.org/newtmgr v0.0.0-20190808223606-13b828d6f85f
+	mynewt.apache.org/newt v0.0.0-20190805215728-4e771ee138aa
+	mynewt.apache.org/newtmgr v0.0.0-20190909210301-5029f07bf173
 )
diff --git a/go.sum b/go.sum
index 306121a..dd61b48 100644
--- a/go.sum
+++ b/go.sum
@@ -1,6 +1,5 @@
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/NickBall/go-aes-key-wrap v0.0.0-20170929221519-1c3aa3e4dfc5/go.mod h1:w5D10RxC0NmPYxmQ438CC1S07zaC1zpvuNW7s5sUk2Q=
-github.com/abiosoft/ishell v2.0.0+incompatible/go.mod h1:HQR9AqF2R3P4XXpMpI0NAzgHf/aS6+zVXRj14cVk9qg=
 github.com/abiosoft/readline v0.0.0-20180607040430-155bce2042db h1:CjPUSXOiYptLbTdr1RceuZgSFDQ7U15ITERUGrUORx8=
 github.com/abiosoft/readline v0.0.0-20180607040430-155bce2042db/go.mod h1:rB3B4rKii8V21ydCbIzH5hZiCQE7f5E9SzUb/ZZx530=
 github.com/apache/mynewt-artifact v0.0.3/go.mod h1:vFUd47t74KPQMzSBhQ2qp5Hc7D29OU/Tl3xHtFwN3k8=
@@ -8,7 +7,6 @@
 github.com/cheggaaa/pb v1.0.18 h1:G/DgkKaBP0V5lnBg/vx61nVxxAU+VqU5yMzSc0f2PPE=
 github.com/cheggaaa/pb v1.0.18/go.mod h1:pQciLPpbU0oxA0h+VJYYLxO+XeDQb5pZijXscXHm81s=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
-github.com/chzyer/readline v0.0.0-20171208011716-f6d7a1f6fbf3 h1:T7Bw4H6z3WAZ2khw+gfKdYmbKHyy5xiHtk9IHfZqm7g=
 github.com/chzyer/readline v0.0.0-20171208011716-f6d7a1f6fbf3/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
 github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
@@ -51,7 +49,6 @@
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/raff/goble v0.0.0-20170814221208-b12b34f940c4 h1:wa4KKsyv+e7TmpzAfp+TWXG+3s/ZWaQ4QsVqMU5oUrk=
 github.com/raff/goble v0.0.0-20170814221208-b12b34f940c4/go.mod h1:CxaUhijgLFX0AROtH5mluSY71VqpjQBw9JXE2UKZmc4=
 github.com/runtimeco/go-coap v0.0.0-20180109101419-47c23e2a63ea h1:zTOcylKcdobkyW4gySyvvHkAGnOP0QNcGaO0ZQJFgxQ=
 github.com/runtimeco/go-coap v0.0.0-20180109101419-47c23e2a63ea/go.mod h1:x/rLuxedbWFDN497ZirUaDklkWz6JhZLjGdgurMysxM=
@@ -100,17 +97,13 @@
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894 h1:Cz4ceDQGXuKRnVBDTS23GTn/pU5OE2C0WrNTOYK1Uuc=
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-gopkg.in/abiosoft/ishell.v1 v1.0.0-20171224170712-50251d04cb42 h1:SC3lEzz9Nt8Ur/Xn7AUS8qtjtnyDUOG3pB7hJ8JT1qM=
-gopkg.in/abiosoft/ishell.v1 v1.0.0-20171224170712-50251d04cb42/go.mod h1:3LjPMJqZQyIeenUuJm+3oamADXoWVncBdPuAEY3SNZ4=
 gopkg.in/abiosoft/ishell.v2 v2.0.0 h1:/J5yh3nWYSSGFjALcitTI9CLE0Tu27vBYHX0srotqOc=
 gopkg.in/abiosoft/ishell.v2 v2.0.0/go.mod h1:sFp+cGtH6o4s1FtpVPTMcHq2yue+c4DGOVohJCPUzwY=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/cheggaaa/pb.v1 v1.0.28/go.mod h1:V/YB90LKu/1FcN3WVnfiiE5oMCibMjukxqG/qStrOgw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 mynewt.apache.org/newt v0.0.0-20190515182908-60fc2df06bfc/go.mod h1:lFsPYOHxMMWA11pydOeh0GVFiXtx0A9VnzOQ6SiRR88=
-mynewt.apache.org/newt v0.0.0-20190723172213-9f7829a76fef h1:DqtTWY5aQuqBwHpBrjL+kT89ojgeMxWSvEzDnUA2OT8=
-mynewt.apache.org/newt v0.0.0-20190723172213-9f7829a76fef/go.mod h1:oOnor4yY/stqy8RmNmk5UAE9zssKixi68pl805wtCVo=
-mynewt.apache.org/newtmgr v0.0.0-20190801165443-4ba7e39aca9f h1:6su567b13mgaBMakTo92GFboYjT7KGoJdMYBszd9UEI=
-mynewt.apache.org/newtmgr v0.0.0-20190801165443-4ba7e39aca9f/go.mod h1:AEQCGhOKwH5FxIzQCNwvdRP3kd7Uuje9iwVElZ06m34=
-mynewt.apache.org/newtmgr v0.0.0-20190808223606-13b828d6f85f h1:0YrF0m0kNzJKyc3zIawrFOW47mse3MoNcD3pZN3YtGA=
-mynewt.apache.org/newtmgr v0.0.0-20190808223606-13b828d6f85f/go.mod h1:Jg/LsXcv9PVzekouYdz78eZnTFN+jdCqhLTJTo24f9c=
+mynewt.apache.org/newt v0.0.0-20190805215728-4e771ee138aa h1:Cq+8NcwpJqh8OmkkJOaVVFe+MLfUZVD7SNgG+570TAc=
+mynewt.apache.org/newt v0.0.0-20190805215728-4e771ee138aa/go.mod h1:oOnor4yY/stqy8RmNmk5UAE9zssKixi68pl805wtCVo=
+mynewt.apache.org/newtmgr v0.0.0-20190909210301-5029f07bf173 h1:wc6WlCRby/FddD1YC24ADxV0vRZtKcjvTLNyYsrO928=
+mynewt.apache.org/newtmgr v0.0.0-20190909210301-5029f07bf173/go.mod h1:Jg/LsXcv9PVzekouYdz78eZnTFN+jdCqhLTJTo24f9c=