Pin dependencies

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
grunt (source)	devDependencies	pin	^1.3.0 -> 1.3.0
grunt-checktextdomain	devDependencies	pin	~1.0.1 -> 1.0.1
grunt-contrib-clean	devDependencies	pin	~2.0.0 -> 2.0.0
grunt-contrib-compress	devDependencies	pin	^1.5.0 -> 1.6.0
grunt-contrib-copy	devDependencies	pin	^1.0.0 -> 1.0.0
grunt-dev-update	devDependencies	pin	^2.3.0 -> 2.3.0
grunt-newer	devDependencies	pin	~1.3.0 -> 1.3.0
grunt-potomo	devDependencies	pin	~3.5.0 -> 3.5.0
grunt-text-replace	devDependencies	pin	^0.4.0 -> 0.4.0
grunt-wp-i18n	devDependencies	pin	^1.0.3 -> 1.0.3
load-grunt-tasks	devDependencies	pin	~4.0.0 -> 4.0.0

:pushpin: Important: Renovate will wait until you have merged this Pin PR before creating any upgrade PRs for the affected packages. Add the preset :preserveSemverRanges to your config if you instead don't wish to pin dependencies.

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