Add first step of Lua 5.3 std lib (#189)

* Add first step of Lua 5.3 std lib * Address review comments * Update CHANGELOG.md Co-authored-by: boyned//Kampfkarren <[email protected]>
Kampfkarren · Dec 21, 2020 · 177a060 · 177a060
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -6,6 +6,11 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - Added inline lint filtering, read [the documentation](https://kampfkarren.github.io/selene/usage/filtering.html) for more information.
 - More errors now set the exit code.
 - Added support for error({any}) to the Roblox standard library.
+- Added initial support for Lua 5.3 in the "lua53" standard library:
+    - New function `string.pack`
+    - New function `string.unpack`
+    - New function `string.packsize`
+    - New optional arg for `math.log`
 
 ### Changed
 - `UDim.new` and `Region3int16.new` no longer require parameters.

diff --git a/selene-lib/default_std/lua53.toml b/selene-lib/default_std/lua53.toml
@@ -0,0 +1,18 @@
+[selene]
+base = "lua52"
+
+[[math.log.args]]
+type = "number"
+
+[[math.log.args]]
+type = "number"
+required = false
+
+[[string.pack.args]]
+type = "string"
+
+[[string.packsize.args]]
+type = "string"
+
+[[string.unpack.args]]
+type = "string"