Use wolfSSL 5.6.0 for tests

The `--enable-heapmath` configure option has been deprecated.  As
already described in eae30af029 ("Use wolfSSL 5.4.0 for tests"), the
alternative is to configure `--with-max-rsa-bits=8192` instead in order
to test the modp6144 and modp8192 DH groups.

scripts/test.sh

@@ -37,7 +37,7 @@ build_botan()
 
 build_wolfssl()
 {
-	WOLFSSL_REV=v5.5.4-stable
+	WOLFSSL_REV=v5.6.0-stable
 	WOLFSSL_DIR=$DEPS_BUILD_DIR/wolfssl
 
 	if test -d "$WOLFSSL_DIR"; then
@@ -53,7 +53,7 @@ build_wolfssl()
 					--enable-aesccm --enable-aesctr --enable-camellia
 					--enable-curve25519 --enable-curve448 --enable-des3
 					--enable-ecccustcurves --enable-ed25519 --enable-ed448
-					--enable-heapmath --enable-keygen --enable-md4
+					--enable-keygen --with-max-rsa-bits=8192 --enable-md4
 					--enable-rsapss --enable-sha3 --enable-shake256"
 
 	git clone https://github.com/wolfSSL/wolfssl.git $WOLFSSL_DIR &&