Use elixir executable to print the version, closes #70

src/install-elixir.ps1

@@ -16,4 +16,4 @@ $ProgressPreference="SilentlyContinue"
 Expand-Archive -DestinationPath "${DIR_FOR_BIN}" -Path "${FILE_OUTPUT}"
 $ProgressPreference="Continue"
 Write-Output "Installed Elixir version follows"
-& "$DIR_FOR_BIN/bin/iex" "-v" | Write-Output
+& "$DIR_FOR_BIN/bin/elixir" "-v" | Write-Output

src/install-elixir.sh

@@ -13,4 +13,4 @@ wget -q -O "${FILE_OUTPUT}" "https://repo.hex.pm/builds/elixir/${FILE_INPUT}"
 mkdir -p "${DIR_FOR_BIN}"
 unzip -q -d "${DIR_FOR_BIN}" "${FILE_OUTPUT}"
 echo "Installed Elixir version follows"
-${DIR_FOR_BIN}/bin/iex -v
+${DIR_FOR_BIN}/bin/elixir -v