Fix some typos.

src/lib/types.h

@@ -348,7 +348,7 @@ class SecurityContext;
 }
 
 typedef struct rnp_keygen_crypto_params_t {
-    // Asymmteric algorithm that user requesed key for
+    // Asymmetric algorithm that user requested key for
     pgp_pubkey_alg_t key_alg;
     // Hash to be used for key signature
     pgp_hash_alg_t hash_alg;