Move YEAR definition to version.py

If it needs to be hardcoded (for the sake of reproducible builds),
it should be together with the other hardcoded version info.

And yeah, two months in, let's move to 2019.

methods.py

@@ -55,7 +55,7 @@ def update_version(module_version_string=""):
     f.write("#define VERSION_STATUS \"" + str(version.status) + "\"\n")
     f.write("#define VERSION_BUILD \"" + str(build_name) + "\"\n")
     f.write("#define VERSION_MODULE_CONFIG \"" + str(version.module_config) + module_version_string + "\"\n")
-    f.write("#define VERSION_YEAR " + str(2018) + "\n")
+    f.write("#define VERSION_YEAR " + str(version.year) + "\n")
     f.close()
 
     # NOTE: It is safe to generate this file here, since this is still executed serially

version.py

@@ -4,3 +4,4 @@ major = 3
 minor = 1
 status = "beta"
 module_config = ""
+year = 2019