This includes the following API changes:

* Core
  * New functions:
    * `LLVMArrayType2`
    * `LLVMGetArrayLength2`
    * `LLVMIsAValueAsMetadata`
    * `LLVMConstArray2`
    * `LLVMReplaceMDNodeOperandWith`
    * `LLVMGetNUW`
    * `LLVMSetNUW`
    * `LLVMGetNSW`
    * `LLVMSetNSW`
    * `LLVMGetExact`
    * `LLVMSetExact`
  * Deprecated functions:
    * `LLVMArrayType`
    * `LLVMGetArrayLength`
    * `LLVMConstArray`
  * Removed functions:
    * `LLVMContextSetOpaquePointers`
    * `LLVMConstSelect`
* Debug info
  * New language:
    * Mojo
  * New function:
    * `LLVMGetDINodeTag`
* Transforms
  * PassRegistry and pass initialization removed, as they were
    the part of legacy Pass Manager. This results in complete
    removal of the following modules:
    * `instcombine`
    * `ipo`
    * `pass_manager_builder`
    * `scalar`
    * `util`
    * `vectorize`
  * PassBuilder
    * New function:
      * `LLVMPassBuilderOptionsSetInlinerThreshold`