Publish ngx-testing v1.0.0

[DenisValcke]

Publish the v1.0.0 version of the ngx-testing package.

This version contains serveral helper functions:

• provideMock
• testIdSelector
• queryByCss
• findEl
• findEls
• getText
• expectText
• expectContainedText
• expectContent
• dispatchFakeEvent
• setFieldElementValue
• setFieldValue
• checkField
• makeClickEvent
• click
• findComponent
• findComponents

These functions allow for easier testing with reduced duplicate code.

PR: TBD