Server.types field is not thread safe

[Satbek]

Description:

The Server.types field is not thread-safe. It is used within context.value:

• [Server.types initialization](

  psql-wire/wire.go

  Line 37 in b095303

  types: pgtype.NewMap(),

  )
• Context usage of Server.types

This field can be accessed concurrently by multiple goroutines. For example:

• Access from row.go

I encountered a concurrent map writes runtime error when running the load tests:

---

Error Log:

fatal error: concurrent map writes
fatal error: concurrent map writes

goroutine 130 [running]:
github.com/jackc/pgx/v5/pgtype.(*Map).PlanEncode(0x1400029a3f0, 0x14, 0x0, {0x1032d2260, 0x10375d5e0})
    /Users/s.turganbayev/go/pkg/mod/github.com/jackc/pgx/v5@v5.4.3/pgtype/pgtype.go:1179 +0x78
github.com/jackc/pgx/v5/pgtype.(*Map).Encode(0x1400029a3f0, 0x14, 0x0, {0x1032d2260, 0x10375d5e0}, {0x1037a7320, 0x0, 0x0})
    /Users/s.turganbayev/go/pkg/mod/github.com/jackc/pgx/v5@v5.4.3/pgtype/pgtype.go:1901 +0x4c
github.com/jeroenrinzema/psql-wire.Column.Write({0x0, 0x0, 0x0, {0x140003a0060, 0x2}, 0x0, 0x14, 0x0, 0x0}, {0x1033ed0d0, ...}, ...)
    /Users/s.turganbayev/go/pkg/mod/github.com/jeroenrinzema/psql-wire@v0.12.1/row.go:161 +0xd4
github.com/jeroenrinzema/psql-wire.Columns.Write({0x14080974000, 0x3, 0x140003a00a0?}, {0x1033ed0d0, 0x1400041c460}, {0x0, 0x0, 0x4?}, 0x140003f8360, {0x1408096c750, ...})
    /Users/s.turganbayev/go/pkg/mod/github.com/jeroenrinzema/psql-wire@v0.12.1/row.go:92 +0x1c4
...
created by github.com/jeroenrinzema/psql-wire.(*Server).Serve in goroutine 1
    /Users/s.turganbayev/go/pkg/mod/github.com/jeroenrinzema/psql-wire@v0.12.1/wire.go:114 +0x184