fix(package): update @openui5/sap.m to version 1.78.1

Closes #109

Author: greenkeeper[bot]

package.json

@@ -138,7 +138,7 @@
     "yargs": "15.3.1"
   },
   "dependencies": {
-    "@openui5/sap.m": "1.77.2",
+    "@openui5/sap.m": "1.78.1",
     "@openui5/sap.ui.core": "1.77.2",
     "@openui5/themelib_sap_belize": "1.77.2",
     "c3": "https://github.com/pulseshift/c3#master",