Docs: Update issue templates (#11163)

This updates the issue templates to add the appropriate labels to new issues depending on which template was used.

This uses a recently-shipped GitHub feature: https://blog.github.com/changelog/2018-12-05-issue-template-automation-improvements/

.github/ISSUE_TEMPLATE/BUG_REPORT.md

@@ -1,6 +1,9 @@
 ---
 name: "\U0001F41E  Bug report"
 about: Report an issue with ESLint or rules bundled with ESLint
+title: ''
+labels: bug, evaluating
+assignees: ''
 
 ---
 
@@ -56,5 +59,3 @@ about: Report an issue with ESLint or rules bundled with ESLint
 
 
 **Are you willing to submit a pull request to fix this bug?**
-
-

.github/ISSUE_TEMPLATE/CHANGE.md

@@ -1,6 +1,9 @@
 ---
 name: "\U0001F4DD Non-rule change request"
 about: Request a change that is not a bug fix, rule change, or new rule
+title: ''
+labels: core, enhancement, evaluating
+assignees: ''
 
 ---
 
@@ -27,4 +30,3 @@ about: Request a change that is not a bug fix, rule change, or new rule
 
 
 **Are you willing to submit a pull request to implement this change?**
-

.github/ISSUE_TEMPLATE/NEW_RULE.md

@@ -1,6 +1,9 @@
 ---
 name: "\U0001F680 New rule proposal"
 about: Propose a new rule to be added to ESLint
+title: ''
+labels: rule, feature, evaluating
+assignees: ''
 
 ---
 
@@ -37,4 +40,3 @@ about: Propose a new rule to be added to ESLint
 
 
 **Are you willing to submit a pull request to implement this rule?**
-

.github/ISSUE_TEMPLATE/QUESTION.md

@@ -1,6 +1,9 @@
 ---
 name: "⛔ Question"
 about: Please go to https://gitter.im/eslint/eslint
+title: ''
+labels: ''
+assignees: ''
 
 ---
 

.github/ISSUE_TEMPLATE/RULE_CHANGE.md

@@ -1,6 +1,9 @@
 ---
 name: "\U0001F4DD Rule change request"
 about: Request a change to an existing rule
+title: ''
+labels: enhancement, evaluating, rule
+assignees: ''
 
 ---
 
@@ -34,4 +37,4 @@ about: Request a change to an existing rule
 
 **What will the rule do after it's changed?**
 
-**Are you willing to submit a pull request to implement this change?**
+**Are you willing to submit a pull request to implement this change?**

.github/ISSUE_TEMPLATE/SECURITY.md

@@ -1,6 +1,9 @@
 ---
 name: "⛔ Security issue"
 about: Please file security issues at https://hackerone.com/eslint
+title: ''
+labels: ''
+assignees: ''
 
 ---