Add wasm bindings for Pubkey and Keypair

(cherry picked from commit 488dc37fec)

ci/buildkite-pipeline.sh

@@ -226,6 +226,19 @@ EOF
     annotate --style info \
       "downstream-projects skipped as no relevant files were modified"
   fi
+
+  # Wasm support
+  if affects \
+             ^ci/test-wasm.sh \
+             ^ci/test-stable.sh \
+             ^sdk/ \
+      ; then
+    command_step wasm ". ci/rust-version.sh; ci/docker-run.sh \$\$rust_stable_docker_image ci/test-wasm.sh" 20
+  else
+    annotate --style info \
+      "wasm skipped as no relevant files were modified"
+  fi
+
   # Benches...
   if affects \
              .rs$ \