deps: updates wazero to 1.0.0-pre.4 (#41)

This updates [wazero](https://wazero.io/) to [1.0.0-pre.4](https://github.com/tetratelabs/wazero/releases/tag/v1.0.0-pre.4).

Notably, v1.0.0-pre.4:
* improves module initialization speed
* supports listeners in the compiler engine
* supports WASI `fd_pread`, `fd_readdir` and `path_filestat_get`
* breaks GoModuleFunc API
Signed-off-by: NAdrian Cole <adrian@tetrate.io>
Signed-off-by: NAdrian Cole <adrian@tetrate.io>

go.mod

@@ -5,6 +5,6 @@ module wa-lang.org/wa
 go 1.17
 
 require (
-	github.com/tetratelabs/wazero v1.0.0-pre.3
+	github.com/tetratelabs/wazero v1.0.0-pre.4
 	wa-lang.org/wabt-go v1.2.3
 )

go.sum

-github.com/tetratelabs/wazero v1.0.0-pre.3 h1:Z5fbogMUGcERzaQb9mQU8+yJSy0bVvv2ce3dfR4wcZg=
-github.com/tetratelabs/wazero v1.0.0-pre.3/go.mod h1:M8UDNECGm/HVjOfq0EOe4QfCY9Les1eq54IChMLETbc=
+github.com/tetratelabs/wazero v1.0.0-pre.4 h1:RBJQT5OzmORkSp6MmZDWoFEr0zXjk4pmvMKAdeUnsaI=
+github.com/tetratelabs/wazero v1.0.0-pre.4/go.mod h1:u8wrFmpdrykiFK0DFPiFm5a4+0RzsdmXYVtijBKqUVo=
 wa-lang.org/wabt-go v1.2.3 h1:xwGW3+IrCMAPDx+ngQFx7vl0xBc1vuooRNql7i2yCiA=
 wa-lang.org/wabt-go v1.2.3/go.mod h1:v4fKY/p4oMiKwQ2S2aC/wOXvJ2bk2MgtLmwK0TKTNx0=