update changes in 8.3

Author: bobzhang

Changes.md

@@ -1,4 +1,66 @@
 `*` means  potential break changes
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+# 8.3
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+- #4694, #4712 improving/customizing the underlying ninja build system, better performance  
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+- #4681, #4710 creating persistent lib/bs.compiler.log per each build for editor diagnostics
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+- #4688, #4707 better error message
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+- * #4702  remove nativeint module which is not meaningful on js platform
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+- #4701 support both `bs.val` and `val` attributes, in the future to recommend the shorter ones
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+- #4693 Fix the compiler runtime issue, always flush err_formatter when at_exit
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+- #4687, #4689, #4691 allow user to customize js file extension in bsconfig.json (checkout the schema )
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+- #4685, #4624, #4690 allow more character set in filenames to make rescript play better with react native and next.js
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+- #4684 fix the raise of Sys.is_directory, make bsb works better with Emacs temp files
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+- #4679 better error message for nonrec GADT
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+- #4671, #4678 better strategies to remove staled output for the build system
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+- #4676 (internal) add Config.syntax_kind so that some changes in super_errors can be made upstream
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+- #4650, #4656, #4657, #4662 always warn-as-error while not degrading user expereince (with the help of build system)
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+- #4661 (internal) not depending on upstream compenv module
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+- #4639, #4642 refined static analysis to generate better code 
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+- #4636, #4641 es6 default import support 
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+- #4638 clean up the confusing error message over uncurry label
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+- #4637 remove unneeded mention of BuckleScript in uncurried message
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+- #4623 better data flow inference for common pattern: `let {a,b,c} = ...`
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+- #4622 add html element & observer phanton types
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+- #4618 fix combination of bs.obj with bs.as so that bs.as can carry more kinds of playload
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+- #4613 (internal) pass down @inlined attribute from upstream. (the info is passed down, how to make use of it is not done yet)
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+- #4609 Lift the restriction that user can only defined a type with less than 256 constructors
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+- #4606, #3961 (internal) use is_a_functor from upstream instead of guessing
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+- #4605 (experimental) take `@@inline` attribute into consideration for functions
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+- #4604 enhance Random module
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+- #4600, #4599 fix missing bounds checking for Bytes.set
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+- #4597 fix Js.Array and Js.Array2 the wrong return type for `from` method
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+- #4513 better error message when interface/implementation mismatches (done in commit db485f1)
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 # 8.2
 
 - `bsc -fmt myFile` now changed to `bsc -format myFile`