Bump github.com/mafredri/cdp from 0.19.0 to 0.20.0 (#159)

Bumps [github.com/mafredri/cdp](https://github.com/mafredri/cdp) from 0.19.0 to 0.20.0.
- [Release notes](https://github.com/mafredri/cdp/releases)
- [Commits](https://github.com/mafredri/cdp/compare/v0.19.0...v0.20.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Gopkg.lock

@@ -93,13 +93,12 @@
   version = "v0.2.7"
 
 [[projects]]
-  digest = "1:7ffdd69928c5153fc351132aa80bbcc18a8f8122de1ba592cf42dccb65732361"
+  digest = "1:612ebc66cfa7484088f90ab86c7f1eb3d7696cf38ec2451c63f8d6008ff7625f"
   name = "github.com/mafredri/cdp"
   packages = [
     ".",
     "devtool",
     "internal/errors",
-    "protocol",
     "protocol/accessibility",
     "protocol/animation",
     "protocol/applicationcache",
@@ -145,8 +144,8 @@
     "session",
   ]
   pruneopts = "UT"
-  revision = "75b0ecc5efcff27ac756a33ec71f0db75dc3d21c"
-  version = "v0.19.0"
+  revision = "0b30a3d15c28f2c8f028f99009cfba0b19baf126"
+  version = "v0.20.0"
 
 [[projects]]
   digest = "1:c658e84ad3916da105a761660dcaeb01e63416c8ec7bc62256a9b411a05fcd67"

Gopkg.toml

@@ -35,7 +35,7 @@
 
 [[constraint]]
   name = "github.com/mafredri/cdp"
-  version = "0.19.0"
+  version = "0.20.0"
 
 [[constraint]]
   name = "github.com/chzyer/readline"