Add a releases/... alias to every release post

Done automatically using:

```sh
FIX_FRONT_MATTER=1 cargo test -p front_matter
```

(Plus a manual fix of the alias for Rust 1.31.0, which was guessed to be
1.31.2018, because the edition number is in the post slug.)

Author: senekor

content/Rust-1.0@1.md

@@ -2,7 +2,10 @@
 path = "2015/05/15/Rust-1.0"
 title = "Announcing Rust 1.0"
 authors = ["The Rust Core Team"]
-aliases = ["2015/05/15/Rust-1.0.html"]
+aliases = [
+    "2015/05/15/Rust-1.0.html",
+    "releases/1.0.0",
+]
 
 [extra]
 release = true

content/Rust-1.1.md

@@ -2,7 +2,10 @@
 path = "2015/06/25/Rust-1.1"
 title = "Rust 1.1 stable, the Community Subteam, and RustCamp"
 authors = ["The Rust Core Team"]
-aliases = ["2015/06/25/Rust-1.1.html"]
+aliases = [
+    "2015/06/25/Rust-1.1.html",
+    "releases/1.1.0",
+]
 
 [extra]
 release = true

content/Rust-1.10.md

@@ -2,7 +2,10 @@
 path = "2016/07/07/Rust-1.10"
 title = "Announcing Rust 1.10"
 authors = ["The Rust Core Team"]
-aliases = ["2016/07/07/Rust-1.10.html"]
+aliases = [
+    "2016/07/07/Rust-1.10.html",
+    "releases/1.10.0",
+]
 
 [extra]
 release = true

content/Rust-1.11.md

@@ -2,7 +2,10 @@
 path = "2016/08/18/Rust-1.11"
 title = "Announcing Rust 1.11"
 authors = ["The Rust Core Team"]
-aliases = ["2016/08/18/Rust-1.11.html"]
+aliases = [
+    "2016/08/18/Rust-1.11.html",
+    "releases/1.11.0",
+]
 
 [extra]
 release = true

content/Rust-1.12.1.md

@@ -2,7 +2,10 @@
 path = "2016/10/20/Rust-1.12.1"
 title = "Announcing Rust 1.12.1"
 authors = ["The Rust Core Team"]
-aliases = ["2016/10/20/Rust-1.12.1.html"]
+aliases = [
+    "2016/10/20/Rust-1.12.1.html",
+    "releases/1.12.1",
+]
 
 [extra]
 release = true

content/Rust-1.14.md

@@ -2,7 +2,10 @@
 path = "2016/12/22/Rust-1.14"
 title = "Announcing Rust 1.14"
 authors = ["The Rust Core Team"]
-aliases = ["2016/12/22/Rust-1.14.html"]
+aliases = [
+    "2016/12/22/Rust-1.14.html",
+    "releases/1.14.0",
+]
 
 [extra]
 release = true

content/Rust-1.15.1.md

@@ -2,7 +2,10 @@
 path = "2017/02/09/Rust-1.15.1"
 title = "Announcing Rust 1.15.1"
 authors = ["The Rust Core Team"]
-aliases = ["2017/02/09/Rust-1.15.1.html"]
+aliases = [
+    "2017/02/09/Rust-1.15.1.html",
+    "releases/1.15.1",
+]
 
 [extra]
 release = true

content/Rust-1.15.md

@@ -2,7 +2,10 @@
 path = "2017/02/02/Rust-1.15"
 title = "Announcing Rust 1.15"
 authors = ["The Rust Core Team"]
-aliases = ["2017/02/02/Rust-1.15.html"]
+aliases = [
+    "2017/02/02/Rust-1.15.html",
+    "releases/1.15.0",
+]
 
 [extra]
 release = true

content/Rust-1.16.md

@@ -2,7 +2,10 @@
 path = "2017/03/16/Rust-1.16"
 title = "Announcing Rust 1.16"
 authors = ["The Rust Core Team"]
-aliases = ["2017/03/16/Rust-1.16.html"]
+aliases = [
+    "2017/03/16/Rust-1.16.html",
+    "releases/1.16.0",
+]
 
 [extra]
 release = true

content/Rust-1.17.md

@@ -2,7 +2,10 @@
 path = "2017/04/27/Rust-1.17"
 title = "Announcing Rust 1.17"
 authors = ["The Rust Core Team"]
-aliases = ["2017/04/27/Rust-1.17.html"]
+aliases = [
+    "2017/04/27/Rust-1.17.html",
+    "releases/1.17.0",
+]
 
 [extra]
 release = true