Bump version to Mbed TLS 2.7.18

Executed ./scripts/bump_version.sh --version 2.7.18

Signed-off-by: Janos Follath <janos.follath@arm.com>
diff --git a/include/mbedtls/version.h b/include/mbedtls/version.h
index 547cd4c..6775a4a 100644
--- a/include/mbedtls/version.h
+++ b/include/mbedtls/version.h
@@ -65,16 +65,16 @@
  */
 #define MBEDTLS_VERSION_MAJOR  2
 #define MBEDTLS_VERSION_MINOR  7
-#define MBEDTLS_VERSION_PATCH  17
+#define MBEDTLS_VERSION_PATCH  18
 
 /**
  * The single version number has the following structure:
  *    MMNNPP00
  *    Major version | Minor version | Patch version
  */
-#define MBEDTLS_VERSION_NUMBER         0x02071100
-#define MBEDTLS_VERSION_STRING         "2.7.17"
-#define MBEDTLS_VERSION_STRING_FULL    "mbed TLS 2.7.17"
+#define MBEDTLS_VERSION_NUMBER         0x02071200
+#define MBEDTLS_VERSION_STRING         "2.7.18"
+#define MBEDTLS_VERSION_STRING_FULL    "mbed TLS 2.7.18"
 
 #if defined(MBEDTLS_VERSION_C)