Kosyak et al.'s height conjecture for cyclotomic polynomials

Let $m$ be a natural number. For a polynomial $f$, its height $h(f)$ is the maximum of the absolute values of its coefficients. Kosyak et al.'s height conjecture. For every natural number $m$, there is a cyclotomic polynomial having height $m$. The conjecture was put forward by Kosyak et al.; the source then proposes the analogous assertion for unitary cyclotomic polynomials.