fix(deps): update dependency addons-linter to v2

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
addons-linter	dependencies	major	1.26.0 -> 2.0.1

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Release Notes

mozilla/addons-linter

v2.0.1

Compare Source

• Fixed webpack config to expose __dirname correctly
• Fixed Travis CI configuration to only release the npm package once

v2.0.0

Compare Source

• We upgraded ESLint from v5 to v7 and enabled new syntax supports like optional chaining, BigInt, and dynamic imports
• Updated dependencies (maintenance)

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[coveralls]

Coverage remained the same at 100.0% when pulling e0a6264 on renovate/addons-linter-2.x into 370886c on master.

[rpl]

This PR can't be merged yet, we need to fix mozilla/addons-linter#3231 on the addons-linter side and wait it to be released on npm in a new release (very likely in a new patch release)