Replace Crypt::NaCl::Sodium with Crypt::Ed25519 (#1182)

First we vendor in `Protocol::Matrix`. Then we patch it to use `Crypt::Ed25519` instead of `Crypt::NaCl::Sodium`. Then we switch the rest of sytest to use `Crypt::Ed25519`.

Hopefully fixes #1114, and generally makes sytest a whole lot easier to install.

cpanfile

@@ -1,20 +1,8 @@
 # vim:ft=perl
 
-# Sodium won't install without this.
-requires 'Alien::Base::ModuleBuild';
-
 requires 'Class::Method::Modifiers';
 
-# workaround for https://github.com/matrix-org/sytest/issues/942:
-# Crypt::NaCl::Sodium won't install with Alien::Sodium 2.0.
-requires 'Alien::Sodium', '<2.0', 'AJGB/Alien-Sodium-1.0.8.0.tar.gz';
-
-# this can be a pain to install.
-#
-# We used to have a libcrypt-nacl-sodium-perl deb, but it was only built for
-# perl 5.14.2.
-#
-requires 'Crypt::NaCl::Sodium';
+requires 'Crypt::Ed25519';
 
 requires 'Data::Dump';
 
@@ -36,6 +24,7 @@ requires 'File::Slurper';
 # Future 0.45 allows you to return immediate values from sequence functions.
 requires 'Future', '>= 0.45';
 requires 'Getopt::Long';
+requires 'HTTP::Request';
 requires 'IO::Async', '>= 0.69';
 requires 'IO::Async::SSL';
 requires 'IO::Socket::IP', '>= 0.04';
@@ -54,7 +43,6 @@ requires 'Module::Pluggable';
 requires 'Net::Async::HTTP', '>= 0.39';
 requires 'Net::Async::HTTP::Server', '>= 0.09';
 requires 'Net::SSLeay', '>= 1.59';
-requires 'Protocol::Matrix', '>= 0.02';
 requires 'Struct::Dumb', '>= 0.04';
 requires 'URI::Escape';
 requires 'YAML::XS';