Fixed the electron build.

- Switched from `grpc` to `@grpc/grpc-js`.
 - Use electron `4.x` due to `@grpc/grpc-js`.
 - Enabled the build on Azure Pipelines.
 - From now on, the TS/JS generation is manual.

Signed-off-by: Akos Kitta <kittaakos@typefox.io>

arduino-ide-extension/scripts/patch-grpc-js.js

@@ -0,0 +1,25 @@
+// Use `@grpc/grpc-js` instead of `grpc` at runtime.
+// https://github.com/grpc/grpc-node/issues/624
+(() => {
+    const fs = require('fs');
+    const path = require('path');
+    const roots = ['src']; // XXX: patch the `lib` instead?
+    console.info("🔧  >>> Patching code. Switching from 'grpc' to '@grpc/grpc-js'...");
+    for (const root of roots) {
+        const cliProtocolPath = path.resolve(__dirname, '..', root, 'node', 'cli-protocol');
+        for (const fileName of fs.readdirSync(cliProtocolPath)) {
+            const filePath = path.resolve(cliProtocolPath, fileName);
+            let content = fs.readFileSync(filePath, { encoding: 'utf8' });
+            if (content.indexOf("require('grpc')") !== -1) {
+                console.info(`Updated require('grpc') to require('@grpc/grpc-js') in ${filePath}.`);
+                fs.writeFileSync(filePath, content.replace("require('grpc')", "require('@grpc/grpc-js')"));
+            }
+            content = fs.readFileSync(filePath, { encoding: 'utf8' });
+            if (content.indexOf('import * as grpc from "grpc"') !== -1) {
+                console.info(`Updated import * as grpc from "grpc" to import * as grpc from "@grpc/grpc-js" in ${filePath}.`);
+                fs.writeFileSync(filePath, content.replace('import * as grpc from "grpc"', 'import * as grpc from "@grpc/grpc-js"'));
+            }
+        }
+    }
+    console.info('👌  <<< Done. The code has been patched.');
+})();