Add support for Windows-arm (#320)

* update to use pwsh if it is available

* fix spacing

* update install script

* Update src/installer.ts

Co-authored-by: Ivan <98037481+IvanZosimov@users.noreply.github.com>

* update index.js

* fix format

Co-authored-by: Ivan <98037481+IvanZosimov@users.noreply.github.com>

dist/index.js

@@ -275,7 +275,7 @@ class DotnetCoreInstaller {
                     command += ` -ProxyBypassList ${process.env['no_proxy']}`;
                 }
                 // process.env must be explicitly passed in for DOTNET_INSTALL_DIR to be used
-                const powershellPath = yield io.which('powershell', true);
+                const powershellPath = (yield io.which('pwsh', false)) || (yield io.which('powershell', true));
                 var options = {
                     listeners: {
                         stdout: (data) => {

src/installer.ts

@@ -116,7 +116,8 @@ export class DotnetCoreInstaller {
       }
 
       // process.env must be explicitly passed in for DOTNET_INSTALL_DIR to be used
-      const powershellPath = await io.which('powershell', true);
+      const powershellPath =
+        (await io.which('pwsh', false)) || (await io.which('powershell', true));
 
       var options: ExecOptions = {
         listeners: {