fix method ambiguities

[kuszmaul]

julia> using FixedPointDecimals
julia> using Aqua
julia> Aqua.test_all(FixedPointDecimals)
13 ambiguities found. To get a list, set `broken = false`.
Ambiguity #1
(::Type{T})(x::FixedPointDecimals.FixedDecimal) where T<:Union{AbstractFloat, Integer, Rational} @ FixedPointDecimals ~/.julia/packages/FixedPointDecimals/SHo3T/src/FixedPointDecimals.jl:521
Bool(x::Real) @ Base float.jl:171

Possible fix, define
  Bool(::FixedPointDecimals.FixedDecimal)
...

[NHDaly]

Thank you 🙏