Lata 11/fix/261

[lata-11]

Description

The code doesn't fix any bug or add new feature.
It minimize promise chaining in asynchronous functions.
Replaced .then with “async - await” wherever possible.

Please describe the changes in your pull request in few words here.

Changes

Before:
const fetchVersion = () => {
return getFossologyVersion()
.then((res) => {
setSessionStorage("fossologyVersion", res);
setVersion(res);
return res;
})
.catch(() => null);
};
After:
const fetchVersion = async () => {
try {
const res = await getFossologyVersion();
setSessionStorage("fossologyVersion", res);
setVersion(res);
return res;
} catch (error) {
return null;
}
};

Please consider using the closing keyword if the pull request is proposed to
fix an issue already created in the repository
closes #261
(https://help.github.com/articles/closing-issues-using-keywords/)