Package compats for AWSS3 is wrong

[glennmoy]

The compat for AWSS3 in the Project.toml made by CompatHelper in #5 is wrong.

Firstly, it doesn't include 0.7 (and seems like it should) and second, it actually doesn't support 0.6.

(@v1.6) pkg> add AWSTools@1.10
...

julia> using Pkg; Pkg.pin("AWSTools")
...

# Not compatible with 0.7
(@v1.6) pkg> add AWSS3@0.7
   Resolving package versions...
ERROR: Unsatisfiable requirements detected for package AWSS3 [1c724243]:
 AWSS3 [1c724243] log:
 ├─possible versions are: 0.4.0-0.8.6 or uninstalled
 ├─restricted to versions 0.7 by an explicit requirement, leaving only versions 0.7.0-0.7.7
 └─restricted by compatibility requirements with AWSTools [83bcdc74] to versions: [0.6.0-0.6.13, 0.8.0-0.8.6] — no versions left
   └─AWSTools [83bcdc74] log:
     ├─possible versions are: 0.0.1-1.10.0 or uninstalled
     └─restricted to versions 1.10.0 by an explicit requirement, leaving only versions 1.10.0

# Supposed to be compatible with 0.6 but isn't
(jl_a8Kxbx) pkg> add AWSS3@0.6
   Resolving package versions...
ERROR: Unsatisfiable requirements detected for package FilePathsBase [48062228]:
 FilePathsBase [48062228] log:
 ├─possible versions are: 0.2.0-0.9.10 or uninstalled
 ├─restricted by compatibility requirements with AWSTools [83bcdc74] to versions: 0.9.0-0.9.10
 │ └─AWSTools [83bcdc74] log:
 │   ├─possible versions are: 0.0.1-1.10.0 or uninstalled
 │   └─restricted to versions 1.10.0 by an explicit requirement, leaving only versions 1.10.0
 └─restricted by compatibility requirements with AWSS3 [1c724243] to versions: 0.6.0-0.8.0 — no versions left
   └─AWSS3 [1c724243] log:
     ├─possible versions are: 0.4.0-0.8.6 or uninstalled
     └─restricted to versions 0.6 by an explicit requirement, leaving only versions 0.6.0-0.6.13

# Only compatible with 0.8
(jl_a8Kxbx) pkg> add AWSS3@0.8
   Resolving package versions...
    Updating `/private/var/folders/l2/zl6x61yd57q95ys8nvkfpmk80000gq/T/jl_a8Kxbx/Project.toml`
  [1c724243] + AWSS3 v0.8.6
  No Changes to `/private/var/folders/l2/zl6x61yd57q95ys8nvkfpmk80000gq/T/jl_a8Kxbx/Manifest.toml`