chore(rust): Update informalsystems-pbjson to v0.7.0 (#274)

Author: romac

rust/Cargo.toml

@@ -24,7 +24,7 @@ ripemd = {version = "0.1.1", optional = true, default-features = false}
 sha2 = {version = "0.10.2", optional = true, default-features = false}
 sha3 = {version = "0.10.2", optional = true, default-features = false}
 serde = {version = "1.0", optional = true, default-features = false}
-informalsystems-pbjson = { version = "0.6.0", optional = true, default-features = false }
+informalsystems-pbjson = { version = "0.7.0", optional = true, default-features = false }
 
 [dev-dependencies]
 blake2 = {version = "0.10.6"}

rust/codegen/Cargo.toml

@@ -10,4 +10,4 @@ edition = "2018"
 bytes = "1.0.1"
 prost = "0.12"
 prost-build = "0.12"
-informalsystems-pbjson-build = "0.6.0"
+informalsystems-pbjson-build = "0.7.0"