Update dateformat requirement to latest (5.0.3)

[rcyeh]

Update dateformat requirement to latest (5.0.3)

[rcyeh]

I wonder how that version specification gets produced?

In this repository's package.json file, the dependencies section is empty

foam/package.json

Line 42 in cdbb965

"dependencies": {}

But in the 0.25.6 package, I see the older version specified

foam/packages/foam-vscode/package.json

Line 702 in cdbb965

"dateformat": "^3.0.3",

[riccardoferretti]

The dependency is defined in foam/packages/foam-vscode/package.json, and yes, it's completely fine to do the upgrade - happy to take it on?

[rcyeh]

Thanks! Created my first pull request ever; attached for your review.

[rcyeh]

Since 4.5.1 supports the appropriate padded week codes and compiles with foam, we'll go to 4.5.1 instead of any higher ECMAscript version.