everestjs: Fix node-addon-api error handling (#200)

* everestjs: Let CMake fail when node-addon-api is missing

If node-addon-api can't be installed, let CMake fail. everestjs
has a hard dependency on this package.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>

* CMakeLists: Replace tab with spaces

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>

---------

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>

CMakeLists.txt

@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.14)
 project(everest-framework
     VERSION 0.16.0
     DESCRIPTION "The open operating system for e-mobility charging stations"
-	LANGUAGES CXX C
+    LANGUAGES CXX C
 )
 
 find_package(everest-cmake 0.4 REQUIRED

everestjs/CMakeLists.txt

@@ -46,7 +46,7 @@ if (NOT NODE_ADDON_API_PACKAGE_DIR)
     )
 
     if (NPM_INSTALL_NODE_ADDON_API_FAILED)
-        message(FATAL "Installation of node-addon-api failed")
+        message(FATAL_ERROR "Installation of node-addon-api failed")
     endif ()
 endif ()