primes(0) returns error

**Problem Statement**
primes(0) returns an error.

**Desired Behavior**
primes(0) returns a 0-element array like primes(0,0) and primes(0,1) do.

**Example**
```
julia> primes(0)
ERROR: ArgumentError: The condition lo ≤ hi must be met.
Stacktrace:
[1] primes(::Int64, ::Int64) at C:\Users\amgough\.juliapro\JuliaPro_v1.4.0-1\packages\Primes\uaYlp\src\Primes.jl:111
[2] primes(::Int64) at C:\Users\amgough\.juliapro\JuliaPro_v1.4.0-1\packages\Primes\uaYlp\src\Primes.jl:126
[3] top-level scope at none:0

julia> primes(0,0)
0-element Array{Int64,1}

julia> primes(0,1)
0-element Array{Int64,1}
```

Julia version and Primes.jl version:
```
julia> versioninfo()
Julia Version 1.4.0
Commit b8e9a9ecc6 (2020-03-21 16:36 UTC)
Platform Info:
OS: Windows (x86_64-w64-mingw32)
CPU: Intel(R) Core(TM) i7-4960X CPU @ 3.60GHz
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-8.0.1 (ORCJIT, ivybridge)
```
```
julia> Pkg.status("LinearAlgebra")
[37e2e46d] LinearAlgebra

```