tools: update ESLint to 6.1.0

Update ESLint to 6.1.0
nodejs · cjihrig · Jul 21, 2019 · Jul 21, 2019 · 5ca0924968856962403b85f35aa85b3a01b6e470
commit 5ca0924968856962403b85f35aa85b3a01b6e470
diff --git a/tools/node_modules/eslint/README.md b/tools/node_modules/eslint/README.md
diff --git a/tools/node_modules/eslint/bin/eslint.js b/tools/node_modules/eslint/bin/eslint.js
diff --git a/tools/node_modules/eslint/lib/cli-engine/cli-engine.js b/tools/node_modules/eslint/lib/cli-engine/cli-engine.js
diff --git a/tools/node_modules/eslint/lib/cli-engine/config-array-factory.js b/tools/node_modules/eslint/lib/cli-engine/config-array-factory.js
diff --git a/tools/node_modules/eslint/lib/cli-engine/file-enumerator.js b/tools/node_modules/eslint/lib/cli-engine/file-enumerator.js
diff --git a/tools/node_modules/eslint/lib/init/config-initializer.js b/tools/node_modules/eslint/lib/init/config-initializer.js
diff --git a/tools/node_modules/eslint/lib/linter/linter.js b/tools/node_modules/eslint/lib/linter/linter.js
diff --git a/tools/node_modules/eslint/lib/rule-tester/rule-tester.js b/tools/node_modules/eslint/lib/rule-tester/rule-tester.js
diff --git a/tools/node_modules/eslint/lib/rules/arrow-body-style.js b/tools/node_modules/eslint/lib/rules/arrow-body-style.js
diff --git a/tools/node_modules/eslint/lib/rules/dot-location.js b/tools/node_modules/eslint/lib/rules/dot-location.js