Update to go 1.16 for mobile builds (#121)

* modified build script to work with updated fork of go-mobile

* changed spacing and added trace for easier debugging

* fixed issue with user input overwritten

* removed mentions of make

* use go 1.16 in builds

* disabled some linters

* updated change log

Co-authored-by: wussler <aron@wussler.it>

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Changed
+- Updated the x/mobile fork and the build script to work with golang 1.16
+
 ## [2.1.6] 2021-03-17
 ### Added
 - Decryption tests for attachments
@@ -734,4 +739,4 @@ VerifyCleartextMessageArmored(publicKey, armored string, verifyTime int64) (stri
 ```
 
 ## [1.0.0] - 2019-05-15
-Initial release, opensourcing of the internal library `PMCrypto`, and subsequent renaming to `gopenpgp`
+Initial release, opensourcing of the internal library `PMCrypto`, and subsequent renaming to `gopenpgp`