Features/Changes

• Compiler: change compilation scheme for branches (#948)
• Compiler: Introduce sub-command: link, build-runtime, build-fs (#987)
• Compiler: embed javascript runtime in the compiler (#978)
• Compiler: refactor javascript lexer/parser, add tests (#986)
• Runtime: clean runtime for string vs bytes
• Runtime: remove many old polyfill
• Runtime: add unix_isatty
• Runtime: optimize caml_call_gen (#996)
• Runtime: change representation of int64 (#905)
• Runtime: improve node.js backend for Sys.command (#979)
• Runtime: add javascript runtime for Str (#998)
• Lib: add closest method to element (#930)
• Lib: add several methods and functions to Typed_array (#970)
• Ppx: ppx_js behave better with merlin (#933)
• Misc: Cleanup Meta files (e.g. js_of_ocaml.tyxml is no longer valid library name)
• Misc: switch to ocamlformat.0.14

Bug fixes

• Compiler: fix vardecl optim (#946)
• Compiler: restore optimization when generating if statements
• Compiler: fix javascript parser in the presence of line directives (#980)
• Runtime: Catch nodejs errors and re-raise them as Sys_error
• Runtime: fix caml_parse_sign_and_base and unsigned syntax
• Runtime: fix caml_js_wrap_meth_callback_strict (#996)
• Runtime: fix over-application of javascript callback (#996)
• Runtime: fix partial-application of javascript callback (#996)
• Runtime: fic caml_js_wrap_meth_callback_unsafe (#996)
• Lib: Fix the type of blur and focus event to be focusEvent (#929)