update issue templates to new format and add more detail

.github/ISSUE_TEMPLATE.md

@@ -1,21 +1,26 @@
-<!--
-Thanks for raising an issue! (For *questions*, we recommend instead using https://stackoverflow.com and adding the 'svelte' tag.)
+------
+Before filing an issue we'd appreciate it if you could take a moment to ensure
+there isn't already an open issue or pull-request.
+-----
 
-To help us help you, if you've found a bug please consider the following:
+If there's an existing issue, please add a :+1: reaction to the description of
+the issue. One way we prioritize issues is by the number of :+1: reactions on
+their descriptions. Please DO NOT add `+1` or :+1: comments.
 
-* If you can demonstrate the bug using https://svelte.dev/repl, please do.
-* If that's not possible, we recommend creating a small repo that illustrates the problem.
-* Make sure you include information about the browser, and which version of Svelte you're using
+### Feature requests and proposals
+We're excited to hear how we can make Svelte better. Please add as much detail
+as you can on your use case.
 
-Reproductions should be small, self-contained, correct examples – http://sscce.org.
+### Bugs
+If you're filing an issue about a bug please include as much information
+as you can including the following.
 
-Occasionally, this won't be possible, and that's fine – we still appreciate you raising the issue. But please understand that Svelte is run by unpaid volunteers in their free time, and issues that follow these instructions will get fixed faster.
+- Your browser and the version: (e.x. Chrome 52.1, Firefox 48.0, IE 10)
+- Your operating system: (e.x. OS X 10, Windows XP, etc)
+- Svelte version (Please check you can reproduce the issue with the latest release!)
+- Whether your project uses Webpack or Rollup
 
-If you have a stack trace to include, we recommend putting inside a `<details>` block for the sake of the thread's readability:
+- *Repeatable steps to reproduce the issue*
 
-<details>
-  <summary>Stack trace</summary>
-
-  Stack trace goes here...
-</details>
--->
+Thanks for being part of Svelte!
+-------

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,52 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: 'Bug'
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**Logs**
+Please include browser console and server logs around the time this bug occured.
+
+**To Reproduce**
+To help us help you, if you've found a bug please consider the following:
+
+* If you can demonstrate the bug using https://svelte.dev/repl, please do.
+* If that's not possible, we recommend creating a small repo that illustrates the problem.
+* Reproductions should be small, self-contained, correct examples – http://sscce.org.
+
+Occasionally, this won't be possible, and that's fine – we still appreciate you raising the issue. But please understand that Svelte is run by unpaid volunteers in their free time, and issues that follow these instructions will get fixed faster.
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Stacktraces**
+If you have a stack trace to include, we recommend putting inside a `<details>` block for the sake of the thread's readability:
+
+<details>
+  <summary>Stack trace</summary>
+
+  Stack trace goes here...
+</details>
+
+**Information about your Svelte project:**
+- Your browser and the version: (e.x. Chrome 52.1, Firefox 48.0, IE 10)
+
+- Your operating system: (e.x. OS X 10, Ubuntu Linux 19.10, Windows XP, etc)
+
+- Svelte version (Please check you can reproduce the issue with the latest release!)
+
+- Whether your project uses Webpack or Rollup
+
+**Severity**
+How severe an issue is this bug to you? Is this annoying, blocking some users, blocking an upgrade or blocking your usage of Svelte entirely?
+
+Note: the more honest and specific you are here the more we will take you seriously. 
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,23 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: 'New Feature'
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**How important is this feature to you?**
+Note: the more honest and specific you are here the more we will take you seriously. 
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/questions-and-help.md

@@ -0,0 +1,12 @@
+---
+name: Questions and help
+about: If you think you need help with something related to Svelte
+title: ''
+labels: 'Question'
+assignees: ''
+
+---
+
+This issue tracker is intended to collect bug reports and feature requests.
+
+For help with installation, information on how features work, or questions about specific features of Svelte, please come and join us in the [Svelte Discord](https://discord.gg/A4KjDkY) Any issues open for help requests will be closed to keep from clogging up the issue tracker.

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,7 +1,6 @@
-<!--
-Thank you for creating a pull request. Before submitting, please note the following:
 
-* If your pull request implements a new feature, please raise an issue to discuss it before sending code. In many cases features are absent for a reason.
-* This message body should clearly illustrate what problems it solves. If there are related issues, remember to reference them.
-* Ideally, include a test that fails without this PR but passes with it. PRs will only be merged once they pass CI. (Remember to `npm run lint`!)
--->
+
+###### Before submitting the PR, please make sure you do the following
+- [ ] It's really useful if your PR relates to an outstanding issue, so please reference it in your PR, or create an explanatory one.
+### Tests
+-  [ ] Run the tests tests with `npm test` or `yarn test`)