Simple example of secp256k1 library

Revision:
0:23d71aa111c7
Child:
2:6b892a0b43e5
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed_app.json	Sun Sep 15 17:40:28 2019 +0000
@@ -0,0 +1,3 @@
+{
+    "requires": ["bare-metal"]
+}
\ No newline at end of file