Revert "Adopt version 0.0.14 of the language server (#233)"

This reverts commit c7e7da6.

dockerExtension.ts

@@ -26,7 +26,7 @@ import { Reporter } from './telemetry/telemetry';
 import DockerInspectDocumentContentProvider, { SCHEME as DOCKER_INSPECT_SCHEME } from './documentContentProviders/dockerInspect';
 import { DockerExplorerProvider } from './explorer/dockerExplorer';
 import { removeContainer } from './commands/remove-container';
-import { LanguageClient, LanguageClientOptions, ServerOptions, TransportKind, Middleware, DidChangeConfigurationNotification, ConfigurationParams } from 'vscode-languageclient';
+import { LanguageClient, LanguageClientOptions, ServerOptions, TransportKind, Middleware, Proposed, ProposedFeatures, DidChangeConfigurationNotification } from 'vscode-languageclient';
 import { WebAppCreator } from './explorer/deploy/webAppCreator';
 import { AzureImageNode, AzureRegistryNode, AzureRepositoryNode } from './explorer/models/azureRegistryNodes';
 import { DockerHubImageNode, DockerHubRepositoryNode, DockerHubOrgNode } from './explorer/models/dockerHubNodes';
@@ -150,7 +150,7 @@ namespace Configuration {
 
     let configurationListener: vscode.Disposable;
 
-    export function computeConfiguration(params: ConfigurationParams): vscode.WorkspaceConfiguration[] {
+    export function computeConfiguration(params: Proposed.ConfigurationParams): vscode.WorkspaceConfiguration[] {
         if (!params.items) {
             return null;
         }
@@ -192,7 +192,7 @@ function activateLanguageClient(ctx: vscode.ExtensionContext) {
         debug: { module: serverModule, transport: TransportKind.ipc, options: debugOptions }
     }
 
-    let middleware: Middleware = {
+    let middleware: ProposedFeatures.ConfigurationMiddleware | Middleware = {
         workspace: {
             configuration: Configuration.computeConfiguration
         }
@@ -207,6 +207,8 @@ function activateLanguageClient(ctx: vscode.ExtensionContext) {
     }
 
     client = new LanguageClient("dockerfile-langserver", "Dockerfile Language Server", serverOptions, clientOptions);
+    // enable the proposed workspace/configuration feature
+    client.registerProposedFeatures();
     client.onReady().then(() => {
         // attach the VS Code settings listener
         Configuration.initialize();

package.json

@@ -606,14 +606,14 @@
     "azure-arm-containerregistry": "^1.0.0-preview",
     "azure-arm-resource": "^2.0.0-preview",
     "azure-arm-website": "^1.0.0-preview",
-    "dockerfile-language-server-nodejs": "^0.0.14",
+    "dockerfile-language-server-nodejs": "^0.0.13",
     "dockerode": "^2.5.1",
     "gradle-to-js": "^1.0.1",
     "moment": "^2.19.3",
     "opn": "^5.1.0",
     "pom-parser": "^1.1.1",
     "request-promise": "^4.2.2",
     "vscode-extension-telemetry": "^0.0.6",
-    "vscode-languageclient": "^4.0.0"
+    "vscode-languageclient": "^3.5.0-next.4"
   }
 }