updating gqlparser version with race fix (#8106)

Author: aman-bansal

go.mod

@@ -22,7 +22,7 @@ require (
 	github.com/dgraph-io/badger/v3 v3.0.0-20211202135705-3f320f5df1bf
 	github.com/dgraph-io/dgo/v210 v210.0.0-20210421093152-78a2fece3ebd
 	github.com/dgraph-io/gqlgen v0.13.2
-	github.com/dgraph-io/gqlparser/v2 v2.2.1
+	github.com/dgraph-io/gqlparser/v2 v2.2.2
 	github.com/dgraph-io/graphql-transport-ws v0.0.0-20210511143556-2cef522f1f15
 	github.com/dgraph-io/ristretto v0.1.1-0.20210824115121-89e99415887a
 	github.com/dgraph-io/simdjson-go v0.3.0

go.sum

@@ -175,6 +175,8 @@ github.com/dgraph-io/gqlgen v0.13.2/go.mod h1:iCOrOv9lngN7KAo+jMgvUPVDlYHdf7qDws
 github.com/dgraph-io/gqlparser/v2 v2.1.1/go.mod h1:MYS4jppjyx8b9tuUtjV7jU1UFZK6P9fvO8TsIsQtRKU=
 github.com/dgraph-io/gqlparser/v2 v2.2.1 h1:15msK9XEHOSrRqQO48UU+2ZTf1R1U8+tfL9H5D5/eQQ=
 github.com/dgraph-io/gqlparser/v2 v2.2.1/go.mod h1:MYS4jppjyx8b9tuUtjV7jU1UFZK6P9fvO8TsIsQtRKU=
+github.com/dgraph-io/gqlparser/v2 v2.2.2 h1:CnxXOKL4EPguKqcGV/z4u4VoW5izUkOTIsNM6xF+0f4=
+github.com/dgraph-io/gqlparser/v2 v2.2.2/go.mod h1:MYS4jppjyx8b9tuUtjV7jU1UFZK6P9fvO8TsIsQtRKU=
 github.com/dgraph-io/graphql-transport-ws v0.0.0-20210511143556-2cef522f1f15 h1:X2NRsgAtVUAp2nmTPCq+x+wTcRRrj74CEpy7E0Unsl4=
 github.com/dgraph-io/graphql-transport-ws v0.0.0-20210511143556-2cef522f1f15/go.mod h1:7z3c/5w0sMYYZF5bHsrh8IH4fKwG5O5Y70cPH1ZLLRQ=
 github.com/dgraph-io/ristretto v0.1.0/go.mod h1:fux0lOrBhrVCJd3lcTHsIJhq1T2rokOu6v9Vcb3Q9ug=