fix: try next version of gofuzz

- Fix a type Consensys#43
- Add customizable string generators
- Fix bug of NilChange(0) Consensys#47

Author: Baptiste Boussemart

go.mod

@@ -44,7 +44,7 @@ require (
 	github.com/golang/mock v1.4.3
 	github.com/golang/protobuf v1.3.4
 	github.com/golang/snappy v0.0.2-0.20200707131729-196ae77b8a26
-	github.com/google/gofuzz v1.1.1-0.20200604201612-c04b05f3adfa
+	github.com/google/gofuzz v1.2.0
 	github.com/gorilla/websocket v1.4.1-0.20190629185528-ae1634f6a989
 	github.com/graph-gophers/graphql-go v0.0.0-20191115155744-f33e81362277
 	github.com/hashicorp/go-hclog v0.13.0

go.sum

@@ -125,6 +125,7 @@ github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/golang/snappy v0.0.2-0.20200707131729-196ae77b8a26 h1:lMm2hD9Fy0ynom5+85/pbdkiYcBqM1JWmhpAXLmy0fw=
 github.com/golang/snappy v0.0.2-0.20200707131729-196ae77b8a26/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.3.1 h1:Xye71clBPdm5HgqGwUkwhbynsUJZhDbS20FvLhQ2izg=
@@ -133,6 +134,8 @@ github.com/google/go-cmp v0.4.0 h1:xsAVV57WRhGj6kEIi8ReJzQlHHqcBYCElAvkovg3B/4=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/gofuzz v1.1.1-0.20200604201612-c04b05f3adfa h1:Q75Upo5UN4JbPFURXZ8nLKYUvF85dyFRop/vQ0Rv+64=
 github.com/google/gofuzz v1.1.1-0.20200604201612-c04b05f3adfa/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/google/gofuzz v1.2.0 h1:xRy4A+RhZaiKjJ1bPfwQ8sedCA+YS2YcCHW6ec7JMi0=
+github.com/google/gofuzz v1.2.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/gorilla/websocket v1.4.1-0.20190629185528-ae1634f6a989 h1:giknQ4mEuDFmmHSrGcbargOuLHQGtywqo4mheITex54=
 github.com/gorilla/websocket v1.4.1-0.20190629185528-ae1634f6a989/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
 github.com/graph-gophers/graphql-go v0.0.0-20191115155744-f33e81362277 h1:E0whKxgp2ojts0FDgUA8dl62bmH0LxKanMoBr6MDTDM=