Invalid prop: type check failed for prop "mdOffsetX" for MdMenu component

[beune]

Steps to reproduce

Create the following component:

            <md-menu md-align-trigger md-size="auto" md-offset-x="127" :md-offset-y="-36">
              <md-button md-menu-trigger><md-icon>save</md-icon> Foo</md-button>
              <md-menu-content>
                <md-menu-item>Foo</md-menu-item>
              </md-menu-content>
            </md-menu>

The developer console gives the following Vue warning:
Invalid prop: type check failed for prop "mdOffsetX". Expected Number with value 127, got String with value "127".

Which browser?

• Browser: Waterfox G3.1.1
• Vue: 2.6.11
• vue-material: 1.0.0-beta-15
• OS: Arch Linux 5.11.2-arch1-1
• NPM: 7.6.1

What is expected?

No prop type check failure.

What is actually happening?

Prop type check failure.

[beune]

My mistake, I did not pass dynamic props for md-offset-x.