In the composor.json file, the dependency for TinyMCE is defined as '>4'.
This results in TinyMCE jumping from version 4. to 5. without any way block this because this package doesn't define a major version update to handle this.
My suggestion would be to release a 1.1.4 that locks TinyMCE down to version 4 and release a 2.0 version which installs version 5. This way your users can choose themselves which versions works for them and can update their systems before loading TinyMCE 5, which contains breaking changes.
In the composor.json file, the dependency for TinyMCE is defined as '>4'. This results in TinyMCE jumping from version 4. to 5. without any way block this because this package doesn't define a major version update to handle this.
My suggestion would be to release a 1.1.4 that locks TinyMCE down to version 4 and release a 2.0 version which installs version 5. This way your users can choose themselves which versions works for them and can update their systems before loading TinyMCE 5, which contains breaking changes.