add required packages

go.mod

@@ -41,6 +41,7 @@ require (
 	github.com/ledgerwatch/log/v3 v3.3.0
 	github.com/ledgerwatch/secp256k1 v0.0.0-20210626115225-cd5cd00ed72d
 	github.com/logrusorgru/aurora/v3 v3.0.0
+	github.com/panjf2000/ants/v2 v2.4.6 // indirect
 	github.com/pelletier/go-toml v1.9.3
 	github.com/petar/GoLLRB v0.0.0-20190514000832-33fb24c13b99
 	github.com/quasilyte/go-ruleguard/dsl v0.3.6

go.sum

@@ -570,6 +570,8 @@ github.com/onsi/gomega v1.10.1/go.mod h1:iN09h71vgCQne3DLsj+A5owkum+a2tYe+TOCB1y
 github.com/opentracing/opentracing-go v1.1.0/go.mod h1:UkNAQd3GIcIGf0SeVgPpRdFStlNbqXla1AfSYxPUl2o=
 github.com/openzipkin/zipkin-go v0.1.1/go.mod h1:NtoC/o8u3JlF1lSlyPNswIbeQH9bJTmOf0Erfk+hxe8=
 github.com/openzipkin/zipkin-go v0.1.6/go.mod h1:QgAqvLzwWbR/WpD4A3cGpPtJrZXNIiJc5AZX7/PBEpw=
+github.com/panjf2000/ants/v2 v2.4.6 h1:drmj9mcygn2gawZ155dRbo+NfXEfAssjZNU1qoIb4gQ=
+github.com/panjf2000/ants/v2 v2.4.6/go.mod h1:f6F0NZVFsGCp5A7QW/Zj/m92atWwOkY0OIhFxRNFr4A=
 github.com/pascaldekloe/goe v0.0.0-20180627143212-57f6aae5913c/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144TG7ZOy1lc=
 github.com/pelletier/go-toml v1.9.3 h1:zeC5b1GviRUyKYd6OJPvBU/mcVDVoL1OhT17FCt5dSQ=
 github.com/pelletier/go-toml v1.9.3/go.mod h1:u1nR/EPcESfeI/szUZKdtJ0xRNbUoANCkoOuaOx1Y+c=