fix: reuse the 'bumpObjects' module in inject.js

[RomarQ]

The basics

• I branched from develop
• My pull request is against develop
• My code follows the style guide
• I ran npm run format and npm run lint

The details

Proposed Changes

The changes include a small improvement that reuses the imported module bumpObjects instead of loading it again with goog.module.get.

Reason for Changes

bumpObjects is imported here:

blockly/core/inject.js

Line 24 in 63ca83b

const bumpObjects = goog.require('Blockly.bumpObjects');

then used here:

blockly/core/inject.js

Lines 190 to 191 in 63ca83b

	mainWorkspace.addChangeListener(
	bumpObjects.bumpIntoBoundsHandler(mainWorkspace));

and loaded again here:

blockly/core/inject.js

Lines 222 to 223 in 63ca83b

	goog.module.get('Blockly.bumpObjects')
	.bumpTopObjectsIntoBounds(mainWorkspace);

goog.module.get is unnecessary.

Test Coverage

No tests have been modified.

Documentation

The API has not changed.

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[BeksOmega]

Thanks for the fix! LGTM =)