[enhancement] Update mocha from v3.2.0 to v6.1.3

package.json

@@ -54,7 +54,7 @@
         "@types/js-yaml": "^3.5.31",
         "@types/minimatch": "^2.0.29",
         "@types/mkdirp": "^0.5.2",
-        "@types/mocha": "^2.2.35",
+        "@types/mocha": "^5.2.6",
         "@types/node": "^7.0.29",
         "@types/resolve": "^0.0.4",
         "@types/rimraf": "^2.0.2",
@@ -63,7 +63,7 @@
         "github": "^8.2.1",
         "husky": "^0.14.3",
         "json-stringify-pretty-compact": "^1.2.0",
-        "mocha": "^3.2.0",
+        "mocha": "^6.1.3",
         "npm-run-all": "^4.0.2",
         "nyc": "^13.3.0",
         "prettier": "~1.16.4",

test/executable/executableTests.ts

@@ -40,7 +40,7 @@ const dummyLogger: Logger = {
     },
 };
 
-describe("Executable", function(this: Mocha.ISuiteCallbackContext) {
+describe("Executable", function(this: Mocha.Suite) {
     this.slow(3000); // the executable is JIT-ed each time it runs; avoid showing slowness warnings
     this.timeout(10000);
 
@@ -181,7 +181,7 @@ describe("Executable", function(this: Mocha.ISuiteCallbackContext) {
     });
 
     describe("Custom formatters", () => {
-        const createFormatVerifier = (done: MochaDone): ExecFileCallback => (err, stdout) => {
+        const createFormatVerifier = (done: Mocha.Done): ExecFileCallback => (err, stdout) => {
             assert.isNotNull(err, "process should exit with error");
             assert.strictEqual(err.code, 2, "error code should be 2");
             assert.include(