gomod: update go-libp2p-core and go-libp2p-connmgr

go.mod

 module github.com/libp2p/go-libp2p-pubsub
 
 require (
-	github.com/benbjohnson/clock v1.0.1
+	github.com/benbjohnson/clock v1.0.2
 	github.com/gogo/protobuf v1.3.1
 	github.com/ipfs/go-log v1.0.4
 	github.com/libp2p/go-libp2p-blankhost v0.1.6
-	github.com/libp2p/go-libp2p-connmgr v0.2.3
-	github.com/libp2p/go-libp2p-core v0.5.6
+	github.com/libp2p/go-libp2p-connmgr v0.2.4
+	github.com/libp2p/go-libp2p-core v0.5.7
 	github.com/libp2p/go-libp2p-discovery v0.4.0
 	github.com/libp2p/go-libp2p-swarm v0.2.4
 	github.com/multiformats/go-multiaddr v0.2.2

go.sum

@@ -5,8 +5,8 @@ github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
-github.com/benbjohnson/clock v1.0.1 h1:lVM1R/o5khtrr7t3qAr+sS6uagZOP+7iprc7gS3V9CE=
-github.com/benbjohnson/clock v1.0.1/go.mod h1:bGMdMPoPVvcYyt1gHDf4J2KE153Yf9BuiUKYMaxlTDM=
+github.com/benbjohnson/clock v1.0.2 h1:Z0CN0Yb4ig9sGPXkvAQcGJfnrrMQ5QYLCMPRi9iD7YE=
+github.com/benbjohnson/clock v1.0.2/go.mod h1:bGMdMPoPVvcYyt1gHDf4J2KE153Yf9BuiUKYMaxlTDM=
 github.com/btcsuite/btcd v0.0.0-20190213025234-306aecffea32/go.mod h1:DrZx5ec/dmnfpw9KyYoQyYo7d0KEvTkk/5M/vbZjAr8=
 github.com/btcsuite/btcd v0.0.0-20190523000118-16327141da8c/go.mod h1:3J08xEfcugPacsc34/LKRU2yO7YmuT8yt28J8k2+rrI=
 github.com/btcsuite/btcd v0.0.0-20190824003749-130ea5bddde3/go.mod h1:3J08xEfcugPacsc34/LKRU2yO7YmuT8yt28J8k2+rrI=
@@ -132,8 +132,8 @@ github.com/libp2p/go-flow-metrics v0.0.3/go.mod h1:HeoSNUrOJVK1jEpDqVEiUOIXqhbnS
 github.com/libp2p/go-libp2p-blankhost v0.1.4/go.mod h1:oJF0saYsAXQCSfDq254GMNmLNz6ZTHTOvtF4ZydUvwU=
 github.com/libp2p/go-libp2p-blankhost v0.1.6 h1:CkPp1/zaCrCnBo0AdsQA0O1VkUYoUOtyHOnoa8gKIcE=
 github.com/libp2p/go-libp2p-blankhost v0.1.6/go.mod h1:jONCAJqEP+Z8T6EQviGL4JsQcLx1LgTGtVqFNY8EMfQ=
-github.com/libp2p/go-libp2p-connmgr v0.2.3 h1:v7skKI9n+0obPpzMIO6aIlOSdQOmhxTf40cbpzqaGMQ=
-github.com/libp2p/go-libp2p-connmgr v0.2.3/go.mod h1:Gqjg29zI8CwXX21zRxy6gOg8VYu3zVerJRt2KyktzH4=
+github.com/libp2p/go-libp2p-connmgr v0.2.4 h1:TMS0vc0TCBomtQJyWr7fYxcVYYhx+q/2gF++G5Jkl/w=
+github.com/libp2p/go-libp2p-connmgr v0.2.4/go.mod h1:YV0b/RIm8NGPnnNWM7hG9Q38OeQiQfKhHCCs1++ufn0=
 github.com/libp2p/go-libp2p-core v0.0.1/go.mod h1:g/VxnTZ/1ygHxH3dKok7Vno1VfpvGcGip57wjTU4fco=
 github.com/libp2p/go-libp2p-core v0.2.0/go.mod h1:X0eyB0Gy93v0DZtSYbEM7RnMChm9Uv3j7yRXjO77xSI=
 github.com/libp2p/go-libp2p-core v0.2.2/go.mod h1:8fcwTbsG2B+lTgRJ1ICZtiM5GWCWZVoVrLaDRvIRng0=
@@ -146,8 +146,8 @@ github.com/libp2p/go-libp2p-core v0.5.1/go.mod h1:uN7L2D4EvPCvzSH5SrhR72UWbnSGpt
 github.com/libp2p/go-libp2p-core v0.5.3/go.mod h1:uN7L2D4EvPCvzSH5SrhR72UWbnSGpt5/a35Sm4upn4Y=
 github.com/libp2p/go-libp2p-core v0.5.4/go.mod h1:uN7L2D4EvPCvzSH5SrhR72UWbnSGpt5/a35Sm4upn4Y=
 github.com/libp2p/go-libp2p-core v0.5.5/go.mod h1:vj3awlOr9+GMZJFH9s4mpt9RHHgGqeHCopzbYKZdRjM=
-github.com/libp2p/go-libp2p-core v0.5.6 h1:IxFH4PmtLlLdPf4fF/i129SnK/C+/v8WEX644MxhC48=
-github.com/libp2p/go-libp2p-core v0.5.6/go.mod h1:txwbVEhHEXikXn9gfC7/UDDw7rkxuX0bJvM49Ykaswo=
+github.com/libp2p/go-libp2p-core v0.5.7 h1:QK3xRwFxqd0Xd9bSZL+8yZ8ncZZbl6Zngd/+Y+A6sgQ=
+github.com/libp2p/go-libp2p-core v0.5.7/go.mod h1:txwbVEhHEXikXn9gfC7/UDDw7rkxuX0bJvM49Ykaswo=
 github.com/libp2p/go-libp2p-discovery v0.4.0 h1:dK78UhopBk48mlHtRCzbdLm3q/81g77FahEBTjcqQT8=
 github.com/libp2p/go-libp2p-discovery v0.4.0/go.mod h1:bZ0aJSrFc/eX2llP0ryhb1kpgkPyTo23SJ5b7UQCMh4=
 github.com/libp2p/go-libp2p-loggables v0.1.0 h1:h3w8QFfCt2UJl/0/NW4K829HX/0S4KD31PQ7m8UXXO8=