update eslint. fix eslint @typescript-eslint/no-unnecessary-type-assertion errors

Author: a-tarasyuk

package.json

@@ -54,9 +54,9 @@
         "@types/through2": "latest",
         "@types/travis-fold": "latest",
         "@types/xml2js": "^0.4.0",
-        "@typescript-eslint/eslint-plugin": "2.2.0",
-        "@typescript-eslint/experimental-utils": "2.2.0",
-        "@typescript-eslint/parser": "2.2.0",
+        "@typescript-eslint/eslint-plugin": "2.3.2",
+        "@typescript-eslint/experimental-utils": "2.3.2",
+        "@typescript-eslint/parser": "2.3.2",
         "async": "latest",
         "azure-devops-node-api": "^8.0.0",
         "browser-resolve": "^1.11.2",
@@ -65,10 +65,10 @@
         "chalk": "latest",
         "convert-source-map": "latest",
         "del": "5.1.0",
-        "eslint": "6.3.0",
+        "eslint": "6.5.1",
         "eslint-formatter-autolinkable-stylish": "1.0.3",
         "eslint-plugin-import": "2.18.2",
-        "eslint-plugin-jsdoc": "15.9.1",
+        "eslint-plugin-jsdoc": "15.9.9",
         "eslint-plugin-no-null": "1.0.2",
         "fancy-log": "latest",
         "fs-extra": "^6.0.1",

src/testRunner/parallel/host.ts

@@ -147,7 +147,7 @@ namespace Harness.Parallel.Host {
                 }
 
                 cursor.hide();
-                readline.moveCursor(process.stdout, -process.stdout.columns!, -this._lineCount);
+                readline.moveCursor(process.stdout, -process.stdout.columns, -this._lineCount);
                 let lineCount = 0;
                 const numProgressBars = this._progressBars.length;
                 for (let i = 0; i < numProgressBars; i++) {
@@ -156,7 +156,7 @@ namespace Harness.Parallel.Host {
                         process.stdout.write(this._progressBars[i].text + os.EOL);
                     }
                     else {
-                        readline.moveCursor(process.stdout, -process.stdout.columns!, +1);
+                        readline.moveCursor(process.stdout, -process.stdout.columns, +1);
                     }
 
                     lineCount++;